451542 has 32 divisors (see below), whose sum is σ = 1112832. Its totient is φ = 118944.

The previous prime is 451541. The next prime is 451547. The reversal of 451542 is 245154.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133 + ... + 959.

It is an arithmetic number, because the mean of its divisors is an integer number (34776).

2⁴⁵¹⁵⁴² is an apocalyptic number.

451542 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 451542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (556416).

451542 is an abundant number, since it is smaller than the sum of its proper divisors (661290).

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

451542 is a wasteful number, since it uses less digits than its factorization.

451542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852.

The product of its digits is 800, while the sum is 21.

The square root of 451542 is about 671.9687492734. The cubic root of 451542 is about 76.7183730173.

Adding to 451542 its reverse (245154), we get a palindrome (696696).

It can be divided in two parts, 451 and 542, that multiplied together give a palindrome (244442).

The spelling of 451542 in words is "four hundred fifty-one thousand, five hundred forty-two".