1255012405015 has 4 divisors (see below), whose sum is σ = 1506014886024. Its totient is φ = 1004009924008.

The previous prime is 1255012404977. The next prime is 1255012405037. The reversal of 1255012405015 is 5105042105521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1255012405015 - 2²⁵ = 1254978850583 is a prime.

It is a super-2 number, since 2×1255012405015² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125501240497 + ... + 125501240506.

It is an arithmetic number, because the mean of its divisors is an integer number (376503721506).

Almost surely, 2^{1255012405015} is an apocalyptic number.

1255012405015 is a deficient number, since it is larger than the sum of its proper divisors (251002481009).

1255012405015 is an equidigital number, since it uses as much as digits as its factorization.

1255012405015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251002481008.

The product of its (nonzero) digits is 10000, while the sum is 31.

The spelling of 1255012405015 in words is "one trillion, two hundred fifty-five billion, twelve million, four hundred five thousand, fifteen".