812562041 has 4 divisors (see below), whose sum is σ = 813042000. Its totient is φ = 812082084.

The previous prime is 812562031. The next prime is 812562043. The reversal of 812562041 is 140265218.

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, and also an emirpimes, since its reverse is a distinct semiprime: 140265218 = 2 ⋅70132609.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812562041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 812561995 and 812562013.

It is not an unprimeable number, because it can be changed into a prime (812562043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237431 + ... + 240828.

It is an arithmetic number, because the mean of its divisors is an integer number (203260500).

Almost surely, 2^812562041 is an apocalyptic number.

It is an amenable number.

812562041 is a deficient number, since it is larger than the sum of its proper divisors (479959).

812562041 is a wasteful number, since it uses less digits than its factorization.

812562041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479958.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 812562041 is about 28505.4738778362. The cubic root of 812562041 is about 933.1515392382.

The spelling of 812562041 in words is "eight hundred twelve million, five hundred sixty-two thousand, forty-one".