125121237025 has 6 divisors (see below), whose sum is σ = 155150333942. Its totient is φ = 100096989600.

The previous prime is 125121237023. The next prime is 125121237041. The reversal of 125121237025 is 520732121521.

It can be written as a sum of positive squares in 3 ways, for example, as 1453668129 + 123667568896 = 38127^2 + 351664^2 .

It is not a de Polignac number, because 125121237025 - 2¹ = 125121237023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125121237023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2502424716 + ... + 2502424765.

Almost surely, 2^125121237025 is an apocalyptic number.

It is an amenable number.

125121237025 is a deficient number, since it is larger than the sum of its proper divisors (30029096917).

125121237025 is an equidigital number, since it uses as much as digits as its factorization.

125121237025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5004849491 (or 5004849486 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

Adding to 125121237025 its reverse (520732121521), we get a palindrome (645853358546).

The spelling of 125121237025 in words is "one hundred twenty-five billion, one hundred twenty-one million, two hundred thirty-seven thousand, twenty-five".