1252400345503 has 4 divisors (see below), whose sum is σ = 1326070954080. Its totient is φ = 1178729736928.

The previous prime is 1252400345477. The next prime is 1252400345509. The reversal of 1252400345503 is 3055430042521.

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 1252400345503 - 2³⁷ = 1114961392031 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 (1252400345509) 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, 36835304263 + ... + 36835304296.

It is an arithmetic number, because the mean of its divisors is an integer number (331517738520).

Almost surely, 2^{1252400345503} is an apocalyptic number.

1252400345503 is a deficient number, since it is larger than the sum of its proper divisors (73670608577).

1252400345503 is an equidigital number, since it uses as much as digits as its factorization.

1252400345503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73670608576.

The product of its (nonzero) digits is 72000, while the sum is 34.

The spelling of 1252400345503 in words is "one trillion, two hundred fifty-two billion, four hundred million, three hundred forty-five thousand, five hundred three".