402534 has 48 divisors (see below), whose sum is σ = 1010880. Its totient is φ = 114480.

The previous prime is 402529. The next prime is 402541. The reversal of 402534 is 435204.

It is a happy number.

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

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 402534.

It is an unprimeable number.

402534 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 23 ways as a sum of consecutive naturals, for example, 3709 + ... + 3815.

It is an arithmetic number, because the mean of its divisors is an integer number (21060).

2⁴⁰²⁵³⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (505440).

402534 is an abundant number, since it is smaller than the sum of its proper divisors (608346).

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

402534 is a wasteful number, since it uses less digits than its factorization.

402534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 142 counting only the distinct ones).

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

The square root of 402534 is about 634.4556722104. The cubic root of 402534 is about 73.8358915026.

Adding to 402534 its reverse (435204), we get a palindrome (837738).

The spelling of 402534 in words is "four hundred two thousand, five hundred thirty-four".