1257264042 has 16 divisors (see below), whose sum is σ = 2623855680. Its totient is φ = 400866752.

The previous prime is 1257264023. The next prime is 1257264049. The reversal of 1257264042 is 2404627521.

It is a junction number, because it is equal to n+sod(n) for n = 1257263994 and 1257264012.

It is not an unprimeable number, because it can be changed into a prime (1257264049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4555167 + ... + 4555442.

It is an arithmetic number, because the mean of its divisors is an integer number (163990980).

Almost surely, 2^1257264042 is an apocalyptic number.

1257264042 is an abundant number, since it is smaller than the sum of its proper divisors (1366591638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1257264042 is a wasteful number, since it uses less digits than its factorization.

1257264042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9110637.

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 1257264042 is about 35457.9193128982. The cubic root of 1257264042 is about 1079.2999698807.

The spelling of 1257264042 in words is "one billion, two hundred fifty-seven million, two hundred sixty-four thousand, forty-two".