1277930961 has 12 divisors (see below), whose sum is σ = 1846221520. Its totient is φ = 851805720.

The previous prime is 1277930911. The next prime is 1277930963. The reversal of 1277930961 is 1690397721.

1277930961 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1277930961 - 2⁶ = 1277930897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1277930963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74010 + ... + 89628.

Almost surely, 2^1277930961 is an apocalyptic number.

It is an amenable number.

1277930961 is a deficient number, since it is larger than the sum of its proper divisors (568290559).

1277930961 is a wasteful number, since it uses less digits than its factorization.

1277930961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24716 (or 24713 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The square root of 1277930961 is about 35748.1602463679. The cubic root of 1277930961 is about 1085.1817065621.

The spelling of 1277930961 in words is "one billion, two hundred seventy-seven million, nine hundred thirty thousand, nine hundred sixty-one".