812921248 has 12 divisors (see below), whose sum is σ = 1600438770. Its totient is φ = 406460608.

The previous prime is 812921233. The next prime is 812921257. The reversal of 812921248 is 842129218.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 610485264 + 202435984 = 24708^2 + 14228^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 12701863 + ... + 12701926.

Almost surely, 2^812921248 is an apocalyptic number.

It is an amenable number.

812921248 is a deficient number, since it is larger than the sum of its proper divisors (787517522).

812921248 is a wasteful number, since it uses less digits than its factorization.

812921248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25403799 (or 25403791 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 812921248 is about 28511.7738487103. The cubic root of 812921248 is about 933.2890242004.

The spelling of 812921248 in words is "eight hundred twelve million, nine hundred twenty-one thousand, two hundred forty-eight".