7872531 has 4 divisors (see below), whose sum is σ = 10496712. Its totient is φ = 5248352.

The previous prime is 7872521. The next prime is 7872541. The reversal of 7872531 is 1352787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1352787 = 3 ⋅450929.

It is an interprime number because it is at equal distance from previous prime (7872521) and next prime (7872541).

It is a cyclic number.

It is not a de Polignac number, because 7872531 - 2¹⁵ = 7839763 is a prime.

It is a super-2 number, since 2×7872531² = 123953488691922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7872492 and 7872501.

It is not an unprimeable number, because it can be changed into a prime (7872521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1312086 + ... + 1312091.

It is an arithmetic number, because the mean of its divisors is an integer number (2624178).

Almost surely, 2^7872531 is an apocalyptic number.

7872531 is a deficient number, since it is larger than the sum of its proper divisors (2624181).

7872531 is a wasteful number, since it uses less digits than its factorization.

7872531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624180.

The product of its digits is 11760, while the sum is 33.

The square root of 7872531 is about 2805.8030935901. The cubic root of 7872531 is about 198.9320660686.

The spelling of 7872531 in words is "seven million, eight hundred seventy-two thousand, five hundred thirty-one".