1277214309 has 12 divisors (see below), whose sum is σ = 2108417376. Its totient is φ = 729836712.

The previous prime is 1277214293. The next prime is 1277214319. The reversal of 1277214309 is 9034127721.

It is not a de Polignac number, because 1277214309 - 2⁴ = 1277214293 is a prime.

It is a super-2 number, since 2×1277214309² = 3262552782228694962, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1277214319) 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, 10136559 + ... + 10136684.

It is an arithmetic number, because the mean of its divisors is an integer number (175701448).

Almost surely, 2^1277214309 is an apocalyptic number.

It is an amenable number.

1277214309 is a deficient number, since it is larger than the sum of its proper divisors (831203067).

1277214309 is a wasteful number, since it uses less digits than its factorization.

1277214309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20273256 (or 20273253 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 1277214309 is about 35738.1352199580. The cubic root of 1277214309 is about 1084.9788153041.

The spelling of 1277214309 in words is "one billion, two hundred seventy-seven million, two hundred fourteen thousand, three hundred nine".