403542 has 40 divisors (see below), whose sum is σ = 940896. Its totient is φ = 129168.

The previous prime is 403537. The next prime is 403547. The reversal of 403542 is 245304.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (403537) and next prime (403547).

It is a super-2 number, since 2×403542² = 325692291528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a d-powerful number, because it can be written as 4⁶ + 0 + 5⁷ + 3¹⁰ + 4⁹ + 2⁷ .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 403542.

It is not an unprimeable number, because it can be changed into a prime (403547) by changing a digit.

403542 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7588 + ... + 7640.

2⁴⁰³⁵⁴² is an apocalyptic number.

403542 is the 318-th decagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 403542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (470448).

403542 is an abundant number, since it is smaller than the sum of its proper divisors (537354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

403542 is a wasteful number, since it uses less digits than its factorization.

403542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 403542 is about 635.2495572608. The cubic root of 403542 is about 73.8974718413.

Adding to 403542 its reverse (245304), we get a palindrome (648846).

It can be divided in two parts, 40354 and 2, that multiplied together give a palindrome (80708).

The spelling of 403542 in words is "four hundred three thousand, five hundred forty-two".