872542 has 16 divisors (see below), whose sum is σ = 1512432. Its totient is φ = 373120.

The previous prime is 872533. The next prime is 872549. The reversal of 872542 is 245278.

872542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×872542² = 1522659083528, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 872542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872549) by changing a digit.

872542 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 7 ways as a sum of consecutive naturals, for example, 793 + ... + 1540.

It is an arithmetic number, because the mean of its divisors is an integer number (94527).

2⁸⁷²⁵⁴² is an apocalyptic number.

872542 is a deficient number, since it is larger than the sum of its proper divisors (639890).

872542 is a wasteful number, since it uses less digits than its factorization.

872542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363.

The product of its digits is 4480, while the sum is 28.

The square root of 872542 is about 934.0995664275. The cubic root of 872542 is about 95.5569135276.

Subtracting from 872542 its reverse (245278), we obtain a square (627264 = 792²).

The spelling of 872542 in words is "eight hundred seventy-two thousand, five hundred forty-two".