1317257653042 has 4 divisors (see below), whose sum is σ = 1975886479566. Its totient is φ = 658628826520.

The previous prime is 1317257653031. The next prime is 1317257653069. The reversal of 1317257653042 is 2403567527131.

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

It can be written as a sum of positive squares in only one way, i.e., 989708615281 + 327549037761 = 994841^2 + 572319^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1317257652983 and 1317257653001.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329314413259 + ... + 329314413262.

Almost surely, 2^{1317257653042} is an apocalyptic number.

1317257653042 is a deficient number, since it is larger than the sum of its proper divisors (658628826524).

1317257653042 is an equidigital number, since it uses as much as digits as its factorization.

1317257653042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658628826523.

The product of its (nonzero) digits is 1058400, while the sum is 46.

The spelling of 1317257653042 in words is "one trillion, three hundred seventeen billion, two hundred fifty-seven million, six hundred fifty-three thousand, forty-two".