1290812431925 has 12 divisors (see below), whose sum is σ = 1602791077380. Its totient is φ = 1031241131520.

The previous prime is 1290812431897. The next prime is 1290812431963. The reversal of 1290812431925 is 5291342180921.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 30586162321 + 1260226269604 = 174889^2 + 1122598^2 .

It is not a de Polignac number, because 1290812431925 - 2⁶ = 1290812431861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1290812431925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35201660 + ... + 35238309.

It is an arithmetic number, because the mean of its divisors is an integer number (133565923115).

Almost surely, 2^{1290812431925} is an apocalyptic number.

It is an amenable number.

1290812431925 is a deficient number, since it is larger than the sum of its proper divisors (311978645455).

1290812431925 is an equidigital number, since it uses as much as digits as its factorization.

1290812431925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70440712 (or 70440707 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 1290812431925 in words is "one trillion, two hundred ninety billion, eight hundred twelve million, four hundred thirty-one thousand, nine hundred twenty-five".