400025250125 has 8 divisors (see below), whose sum is σ = 499231512312. Its totient is φ = 320020200000.

The previous prime is 400025250103. The next prime is 400025250133. The reversal of 400025250125 is 521052520004.

It can be written as a sum of positive squares in 4 ways, for example, as 126105952996 + 273919297129 = 355114^2 + 523373^2 .

It is not a de Polignac number, because 400025250125 - 2²⁴ = 400008472909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 400025250094 and 400025250103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1600100876 + ... + 1600101125.

It is an arithmetic number, because the mean of its divisors is an integer number (62403939039).

Almost surely, 2^400025250125 is an apocalyptic number.

It is an amenable number.

400025250125 is a deficient number, since it is larger than the sum of its proper divisors (99206262187).

400025250125 is an equidigital number, since it uses as much as digits as its factorization.

400025250125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200202016 (or 3200202006 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

Adding to 400025250125 its reverse (521052520004), we get a palindrome (921077770129).

The spelling of 400025250125 in words is "four hundred billion, twenty-five million, two hundred fifty thousand, one hundred twenty-five".