1272835971 has 16 divisors (see below), whose sum is σ = 2057109120. Its totient is φ = 771415560.

The previous prime is 1272835961. The next prime is 1272835979. The reversal of 1272835971 is 1795382721.

It is not a de Polignac number, because 1272835971 - 2¹⁷ = 1272704899 is a prime.

It is a super-2 number, since 2×1272835971² = 3240222818143025682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1272835979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2142525 + ... + 2143118.

It is an arithmetic number, because the mean of its divisors is an integer number (128569320).

Almost surely, 2^1272835971 is an apocalyptic number.

1272835971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1272835971 is a deficient number, since it is larger than the sum of its proper divisors (784273149).

1272835971 is a wasteful number, since it uses less digits than its factorization.

1272835971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4285663 (or 4285657 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 1272835971 is about 35676.8268067663. The cubic root of 1272835971 is about 1083.7376133927.

The spelling of 1272835971 in words is "one billion, two hundred seventy-two million, eight hundred thirty-five thousand, nine hundred seventy-one".