1265425031205 has 96 divisors (see below), whose sum is σ = 2263568561280. Its totient is φ = 653670950400.

The previous prime is 1265425031201. The next prime is 1265425031249. The reversal of 1265425031205 is 5021305245621.

1265425031205 is a `hidden beast` number, since 1 + 26 + 5 + 4 + 2 + 503 + 120 + 5 = 666.

It is not a de Polignac number, because 1265425031205 - 2² = 1265425031201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1265425031205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265425031201) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 83579526 + ... + 83594664.

It is an arithmetic number, because the mean of its divisors is an integer number (23578839180).

Almost surely, 2^{1265425031205} is an apocalyptic number.

1265425031205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1265425031205 is a deficient number, since it is larger than the sum of its proper divisors (998143530075).

1265425031205 is a wasteful number, since it uses less digits than its factorization.

1265425031205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15651 (or 15648 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 1265425031205 in words is "one trillion, two hundred sixty-five billion, four hundred twenty-five million, thirty-one thousand, two hundred five".