1257462135 has 12 divisors (see below), whose sum is σ = 2179601112. Its totient is φ = 670646448.

The previous prime is 1257462133. The next prime is 1257462149. The reversal of 1257462135 is 5312647521.

1257462135 is a `hidden beast` number, since 1 + 25 + 7 + 4 + 621 + 3 + 5 = 666.

It is not a de Polignac number, because 1257462135 - 2¹ = 1257462133 is a prime.

It is a super-2 number, since 2×1257462135² = 3162422041917516450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1257462135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257462133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13971757 + ... + 13971846.

It is an arithmetic number, because the mean of its divisors is an integer number (181633426).

Almost surely, 2^1257462135 is an apocalyptic number.

1257462135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1257462135 is a deficient number, since it is larger than the sum of its proper divisors (922138977).

1257462135 is a wasteful number, since it uses less digits than its factorization.

1257462135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27943614 (or 27943611 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 1257462135 is about 35460.7125562925. The cubic root of 1257462135 is about 1079.3566513026.

The spelling of 1257462135 in words is "one billion, two hundred fifty-seven million, four hundred sixty-two thousand, one hundred thirty-five".