1251015015413 has 4 divisors (see below), whose sum is σ = 1251067560960. Its totient is φ = 1250962469868.

The previous prime is 1251015015409. The next prime is 1251015015451. The reversal of 1251015015413 is 3145105101521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1251015015413 - 2² = 1251015015409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251015075413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26237045 + ... + 26284682.

It is an arithmetic number, because the mean of its divisors is an integer number (312766890240).

Almost surely, 2^{1251015015413} is an apocalyptic number.

It is an amenable number.

1251015015413 is a deficient number, since it is larger than the sum of its proper divisors (52545547).

1251015015413 is an equidigital number, since it uses as much as digits as its factorization.

1251015015413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52545546.

The product of its (nonzero) digits is 3000, while the sum is 29.

The spelling of 1251015015413 in words is "one trillion, two hundred fifty-one billion, fifteen million, fifteen thousand, four hundred thirteen".