7725131 has 2 divisors, whose sum is σ = 7725132. Its totient is φ = 7725130.

The previous prime is 7725127. The next prime is 7725143. The reversal of 7725131 is 1315277.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7725131 - 2² = 7725127 is a prime.

It is a super-2 number, since 2×7725131² = 119355297934322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7725131.

It is not a weakly prime, because it can be changed into another prime (7725161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3862565 + 3862566.

It is an arithmetic number, because the mean of its divisors is an integer number (3862566).

Almost surely, 2^7725131 is an apocalyptic number.

7725131 is a deficient number, since it is larger than the sum of its proper divisors (1).

7725131 is an equidigital number, since it uses as much as digits as its factorization.

7725131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1470, while the sum is 26.

The square root of 7725131 is about 2779.4119881730. The cubic root of 7725131 is about 197.6826788123.

The spelling of 7725131 in words is "seven million, seven hundred twenty-five thousand, one hundred thirty-one".