812272137 has 32 divisors (see below), whose sum is σ = 1158896640. Its totient is φ = 505128960.

The previous prime is 812272133. The next prime is 812272151. The reversal of 812272137 is 731272218.

It is not a de Polignac number, because 812272137 - 2² = 812272133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 812272098 and 812272107.

It is not an unprimeable number, because it can be changed into a prime (812272133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 387789 + ... + 389877.

It is an arithmetic number, because the mean of its divisors is an integer number (36215520).

Almost surely, 2^812272137 is an apocalyptic number.

It is an amenable number.

812272137 is a deficient number, since it is larger than the sum of its proper divisors (346624503).

812272137 is a wasteful number, since it uses less digits than its factorization.

812272137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2273.

The product of its digits is 9408, while the sum is 33.

The square root of 812272137 is about 28500.3883657749. The cubic root of 812272137 is about 933.0405501572.

The spelling of 812272137 in words is "eight hundred twelve million, two hundred seventy-two thousand, one hundred thirty-seven".