1252459551 has 24 divisors (see below), whose sum is σ = 2005261824. Its totient is φ = 692601840.

The previous prime is 1252459543. The next prime is 1252459573. The reversal of 1252459551 is 1559542521.

It is not a de Polignac number, because 1252459551 - 2³ = 1252459543 is a prime.

It is a super-2 number, since 2×1252459551² = 3137309853782243202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252459451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132865 + ... + 141978.

It is an arithmetic number, because the mean of its divisors is an integer number (83552576).

Almost surely, 2^1252459551 is an apocalyptic number.

1252459551 is a deficient number, since it is larger than the sum of its proper divisors (752802273).

1252459551 is a wasteful number, since it uses less digits than its factorization.

1252459551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274891 (or 274884 counting only the distinct ones).

The product of its digits is 90000, while the sum is 39.

The square root of 1252459551 is about 35390.1052696937. The cubic root of 1252459551 is about 1077.9234077251.

The spelling of 1252459551 in words is "one billion, two hundred fifty-two million, four hundred fifty-nine thousand, five hundred fifty-one".