125431001025 has 48 divisors (see below), whose sum is σ = 226862622720. Its totient is φ = 60645486400.

The previous prime is 125431001021. The next prime is 125431001029. The reversal of 125431001025 is 520100134521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (125431001021) and next prime (125431001029).

It is not a de Polignac number, because 125431001025 - 2² = 125431001021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125431000986 and 125431001004.

It is not an unprimeable number, because it can be changed into a prime (125431001021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84424 + ... + 507926.

It is an arithmetic number, because the mean of its divisors is an integer number (4726304640).

Almost surely, 2^125431001025 is an apocalyptic number.

125431001025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125431001025 is a deficient number, since it is larger than the sum of its proper divisors (101431621695).

125431001025 is a wasteful number, since it uses less digits than its factorization.

125431001025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423886 (or 423881 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 125431001025 its reverse (520100134521), we get a palindrome (645531135546).

The spelling of 125431001025 in words is "one hundred twenty-five billion, four hundred thirty-one million, one thousand, twenty-five".