125642831 has 2 divisors, whose sum is σ = 125642832. Its totient is φ = 125642830.

The previous prime is 125642789. The next prime is 125642849. The reversal of 125642831 is 138246521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125642831 - 2¹⁰ = 125641807 is a prime.

It is a super-2 number, since 2×125642831² = 31572241963389122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125642131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62821415 + 62821416.

It is an arithmetic number, because the mean of its divisors is an integer number (62821416).

Almost surely, 2^125642831 is an apocalyptic number.

125642831 is a deficient number, since it is larger than the sum of its proper divisors (1).

125642831 is an equidigital number, since it uses as much as digits as its factorization.

125642831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 125642831 is about 11209.0512979467. The cubic root of 125642831 is about 500.8556429152.

The spelling of 125642831 in words is "one hundred twenty-five million, six hundred forty-two thousand, eight hundred thirty-one".