1277796321 has 12 divisors (see below), whose sum is σ = 1851721872. Its totient is φ = 849087576.

The previous prime is 1277796319. The next prime is 1277796337. The reversal of 1277796321 is 1236977721.

1277796321 is a `hidden beast` number, since 1 + 2 + 7 + 7 + 7 + 9 + 632 + 1 = 666.

1277796321 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 1277796321 - 2¹ = 1277796319 is a prime.

It is a super-2 number, since 2×1277796321² = 3265526875922270082, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1277796361) 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, 228471 + ... + 233996.

It is an arithmetic number, because the mean of its divisors is an integer number (154310156).

Almost surely, 2^1277796321 is an apocalyptic number.

It is an amenable number.

1277796321 is a deficient number, since it is larger than the sum of its proper divisors (573925551).

1277796321 is a wasteful number, since it uses less digits than its factorization.

1277796321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462780 (or 462777 counting only the distinct ones).

The product of its digits is 222264, while the sum is 45.

The square root of 1277796321 is about 35746.2770229293. The cubic root of 1277796321 is about 1085.1435944364.

The spelling of 1277796321 in words is "one billion, two hundred seventy-seven million, seven hundred ninety-six thousand, three hundred twenty-one".