1296251557067 has 4 divisors (see below), whose sum is σ = 1338066123456. Its totient is φ = 1254436990680.

The previous prime is 1296251557063. The next prime is 1296251557099. The reversal of 1296251557067 is 7607551526921.

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 1296251557067 - 2² = 1296251557063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1296251557063) 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, 20907283148 + ... + 20907283209.

It is an arithmetic number, because the mean of its divisors is an integer number (334516530864).

Almost surely, 2^{1296251557067} is an apocalyptic number.

1296251557067 is a deficient number, since it is larger than the sum of its proper divisors (41814566389).

1296251557067 is an equidigital number, since it uses as much as digits as its factorization.

1296251557067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41814566388.

The product of its (nonzero) digits is 7938000, while the sum is 56.

The spelling of 1296251557067 in words is "one trillion, two hundred ninety-six billion, two hundred fifty-one million, five hundred fifty-seven thousand, sixty-seven".