812145746 has 4 divisors (see below), whose sum is σ = 1218218622. Its totient is φ = 406072872.

The previous prime is 812145713. The next prime is 812145757. The reversal of 812145746 is 647541218.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 515789521 + 296356225 = 22711^2 + 17215^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203036435 + ... + 203036438.

Almost surely, 2^812145746 is an apocalyptic number.

812145746 is a deficient number, since it is larger than the sum of its proper divisors (406072876).

812145746 is a wasteful number, since it uses less digits than its factorization.

812145746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406072875.

The product of its digits is 53760, while the sum is 38.

The square root of 812145746 is about 28498.1709237628. The cubic root of 812145746 is about 932.9921533865.

The spelling of 812145746 in words is "eight hundred twelve million, one hundred forty-five thousand, seven hundred forty-six".