812450641 has 4 divisors (see below), whose sum is σ = 814190832. Its totient is φ = 810710452.

The previous prime is 812450609. The next prime is 812450663. The reversal of 812450641 is 146054218.

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 812450641 - 2⁵ = 812450609 is a prime.

It is a super-2 number, since 2×812450641² = 1320152088122621762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812450671) 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, 869395 + ... + 870328.

It is an arithmetic number, because the mean of its divisors is an integer number (203547708).

Almost surely, 2^812450641 is an apocalyptic number.

It is an amenable number.

812450641 is a deficient number, since it is larger than the sum of its proper divisors (1740191).

812450641 is a wasteful number, since it uses less digits than its factorization.

812450641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740190.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 812450641 is about 28503.5198001931. The cubic root of 812450641 is about 933.1088931275.

The spelling of 812450641 in words is "eight hundred twelve million, four hundred fifty thousand, six hundred forty-one".