124256400025 has 30 divisors (see below), whose sum is σ = 161090522942. Its totient is φ = 95077804800.

The previous prime is 124256399929. The next prime is 124256400029. The reversal of 124256400025 is 520004652421.

It can be written as a sum of positive squares in 3 ways, for example, as 3830743449 + 120425656576 = 61893^2 + 347024^2 .

It is not a de Polignac number, because 124256400025 - 2¹⁷ = 124256268953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 124256400025.

It is not an unprimeable number, because it can be changed into a prime (124256400029) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 6987145 + ... + 7004905.

Almost surely, 2^124256400025 is an apocalyptic number.

It is an amenable number.

124256400025 is a deficient number, since it is larger than the sum of its proper divisors (36834122917).

124256400025 is an frugal number, since it uses more digits than its factorization.

124256400025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17863 (or 17789 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 124256400025 in words is "one hundred twenty-four billion, two hundred fifty-six million, four hundred thousand, twenty-five".