1345071887251 has 4 divisors (see below), whose sum is σ = 1345325823432. Its totient is φ = 1344817951072.

The previous prime is 1345071887249. The next prime is 1345071887267. The reversal of 1345071887251 is 1527881705431.

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 1345071887251 - 2¹ = 1345071887249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1345071887651) 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, 126960145 + ... + 126970738.

It is an arithmetic number, because the mean of its divisors is an integer number (336331455858).

Almost surely, 2^{1345071887251} is an apocalyptic number.

1345071887251 is a deficient number, since it is larger than the sum of its proper divisors (253936181).

1345071887251 is an equidigital number, since it uses as much as digits as its factorization.

1345071887251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253936180.

The product of its (nonzero) digits is 1881600, while the sum is 52.

It can be divided in two parts, 1345071 and 887251, that added together give a palindrome (2232322).

The spelling of 1345071887251 in words is "one trillion, three hundred forty-five billion, seventy-one million, eight hundred eighty-seven thousand, two hundred fifty-one".