1253211557 has 48 divisors (see below), whose sum is σ = 1517875200. Its totient is φ = 1029188160.

The previous prime is 1253211493. The next prime is 1253211577. The reversal of 1253211557 is 7551123521.

It is not a de Polignac number, because 1253211557 - 2⁶ = 1253211493 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 (1253211577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5243444 + ... + 5243682.

It is an arithmetic number, because the mean of its divisors is an integer number (31622400).

Almost surely, 2^1253211557 is an apocalyptic number.

It is an amenable number.

1253211557 is a deficient number, since it is larger than the sum of its proper divisors (264663643).

1253211557 is a wasteful number, since it uses less digits than its factorization.

1253211557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 365 counting only the distinct ones).

The product of its digits is 10500, while the sum is 32.

The square root of 1253211557 is about 35400.7281987250. The cubic root of 1253211557 is about 1078.1391013679.

The spelling of 1253211557 in words is "one billion, two hundred fifty-three million, two hundred eleven thousand, five hundred fifty-seven".