1257124431 has 8 divisors (see below), whose sum is σ = 1730235904. Its totient is φ = 811047960.

The previous prime is 1257124423. The next prime is 1257124441. The reversal of 1257124431 is 1344217521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1257124431 - 2³ = 1257124423 is a prime.

It is a super-2 number, since 2×1257124431² = 3160723670034147522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257124441) 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 7 ways as a sum of consecutive naturals, for example, 6758641 + ... + 6758826.

It is an arithmetic number, because the mean of its divisors is an integer number (216279488).

Almost surely, 2^1257124431 is an apocalyptic number.

1257124431 is a deficient number, since it is larger than the sum of its proper divisors (473111473).

1257124431 is a wasteful number, since it uses less digits than its factorization.

1257124431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13517501.

The product of its digits is 6720, while the sum is 30.

The square root of 1257124431 is about 35455.9505725062. The cubic root of 1257124431 is about 1079.2600186530.

The spelling of 1257124431 in words is "one billion, two hundred fifty-seven million, one hundred twenty-four thousand, four hundred thirty-one".