1257044242 has 4 divisors (see below), whose sum is σ = 1885566366. Its totient is φ = 628522120.

The previous prime is 1257044233. The next prime is 1257044251. The reversal of 1257044242 is 2424407521.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1257044233) and next prime (1257044251).

It can be written as a sum of positive squares in only one way, i.e., 1104299361 + 152744881 = 33231^2 + 12359^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314261059 + ... + 314261062.

Almost surely, 2^1257044242 is an apocalyptic number.

1257044242 is a deficient number, since it is larger than the sum of its proper divisors (628522124).

1257044242 is an equidigital number, since it uses as much as digits as its factorization.

1257044242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628522123.

The product of its (nonzero) digits is 17920, while the sum is 31.

The square root of 1257044242 is about 35454.8197287759. The cubic root of 1257044242 is about 1079.2370703487.

The spelling of 1257044242 in words is "one billion, two hundred fifty-seven million, forty-four thousand, two hundred forty-two".