125601131 has 2 divisors, whose sum is σ = 125601132. Its totient is φ = 125601130.

The previous prime is 125601127. The next prime is 125601139. The reversal of 125601131 is 131106521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125601131 - 2² = 125601127 is a prime.

It is a super-2 number, since 2×125601131² = 31551288216958322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125601139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62800565 + 62800566.

It is an arithmetic number, because the mean of its divisors is an integer number (62800566).

Almost surely, 2^125601131 is an apocalyptic number.

125601131 is a deficient number, since it is larger than the sum of its proper divisors (1).

125601131 is an equidigital number, since it uses as much as digits as its factorization.

125601131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 125601131 is about 11207.1910396852. The cubic root of 125601131 is about 500.8002265916.

Adding to 125601131 its reverse (131106521), we get a palindrome (256707652).

The spelling of 125601131 in words is "one hundred twenty-five million, six hundred one thousand, one hundred thirty-one".