1272392969 has 4 divisors (see below), whose sum is σ = 1339361040. Its totient is φ = 1205424900.

The previous prime is 1272392939. The next prime is 1272392971. The reversal of 1272392969 is 9692932721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1272392969 - 2⁸ = 1272392713 is a prime.

It is a super-2 number, since 2×1272392969² = 3237967735121269922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1272392909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33484007 + ... + 33484044.

It is an arithmetic number, because the mean of its divisors is an integer number (334840260).

Almost surely, 2^1272392969 is an apocalyptic number.

1272392969 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1272392969 is a deficient number, since it is larger than the sum of its proper divisors (66968071).

1272392969 is an equidigital number, since it uses as much as digits as its factorization.

1272392969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66968070.

The product of its digits is 734832, while the sum is 50.

The square root of 1272392969 is about 35670.6177266388. The cubic root of 1272392969 is about 1083.6118696074.

The spelling of 1272392969 in words is "one billion, two hundred seventy-two million, three hundred ninety-two thousand, nine hundred sixty-nine".