1266252790274 has 4 divisors (see below), whose sum is σ = 1899379185414. Its totient is φ = 633126395136.

The previous prime is 1266252790247. The next prime is 1266252790303. The reversal of 1266252790274 is 4720972526621.

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., 1087446439249 + 178806351025 = 1042807^2 + 422855^2 .

It is a super-2 number, since 2×1266252790274² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316563197567 + ... + 316563197570.

Almost surely, 2^{1266252790274} is an apocalyptic number.

1266252790274 is a deficient number, since it is larger than the sum of its proper divisors (633126395140).

1266252790274 is an equidigital number, since it uses as much as digits as its factorization.

1266252790274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633126395139.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 1266252790274 in words is "one trillion, two hundred sixty-six billion, two hundred fifty-two million, seven hundred ninety thousand, two hundred seventy-four".