7872131 has 2 divisors, whose sum is σ = 7872132. Its totient is φ = 7872130.

The previous prime is 7872127. The next prime is 7872149. The reversal of 7872131 is 1312787.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7872131 - 2² = 7872127 is a prime.

It is a super-2 number, since 2×7872131² = 123940892962322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 7872094 and 7872103.

It is not a weakly prime, because it can be changed into another prime (7872181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3936065 + 3936066.

It is an arithmetic number, because the mean of its divisors is an integer number (3936066).

Almost surely, 2^7872131 is an apocalyptic number.

7872131 is a deficient number, since it is larger than the sum of its proper divisors (1).

7872131 is an equidigital number, since it uses as much as digits as its factorization.

7872131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2352, while the sum is 29.

The square root of 7872131 is about 2805.7318118452. The cubic root of 7872131 is about 198.9286967932.

The spelling of 7872131 in words is "seven million, eight hundred seventy-two thousand, one hundred thirty-one".