1257042922 has 8 divisors (see below), whose sum is σ = 1893657636. Its totient is φ = 625823712.

The previous prime is 1257042881. The next prime is 1257042929. The reversal of 1257042922 is 2292407521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1243197081 + 13845841 = 35259^2 + 3721^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1257042929) 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 3 ways as a sum of consecutive naturals, for example, 1348293 + ... + 1349224.

Almost surely, 2^1257042922 is an apocalyptic number.

1257042922 is a deficient number, since it is larger than the sum of its proper divisors (636614714).

1257042922 is a wasteful number, since it uses less digits than its factorization.

1257042922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697752.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 1257042922 is about 35454.8011135304. The cubic root of 1257042922 is about 1079.2366925860.

The spelling of 1257042922 in words is "one billion, two hundred fifty-seven million, forty-two thousand, nine hundred twenty-two".