1251412554503 has 4 divisors (see below), whose sum is σ = 1252390986240. Its totient is φ = 1250434122768.

The previous prime is 1251412554439. The next prime is 1251412554529. The reversal of 1251412554503 is 3054552141521.

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 1251412554503 - 2⁶ = 1251412554439 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 (1251412554563) 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, 489213950 + ... + 489216507.

It is an arithmetic number, because the mean of its divisors is an integer number (313097746560).

Almost surely, 2^{1251412554503} is an apocalyptic number.

1251412554503 is a deficient number, since it is larger than the sum of its proper divisors (978431737).

1251412554503 is an equidigital number, since it uses as much as digits as its factorization.

1251412554503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978431736.

The product of its (nonzero) digits is 120000, while the sum is 38.

The spelling of 1251412554503 in words is "one trillion, two hundred fifty-one billion, four hundred twelve million, five hundred fifty-four thousand, five hundred three".