812125602 has 30 divisors (see below), whose sum is σ = 1820576043. Its totient is φ = 270587628.

The previous prime is 812125597. The next prime is 812125621. The reversal of 812125602 is 206521218.

It is a happy number.

812125602 is a `hidden beast` number, since 81 + 21 + 2 + 560 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 406062801 + 406062801 = 20151^2 + 20151^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=20151.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 in 14 ways as a sum of consecutive naturals, for example, 361599 + ... + 363837.

Almost surely, 2^812125602 is an apocalyptic number.

812125602 is an abundant number, since it is smaller than the sum of its proper divisors (1008450441).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

812125602 is an frugal number, since it uses more digits than its factorization.

812125602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4492 (or 2244 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 812125602 is about 28497.8174953802. The cubic root of 812125602 is about 932.9844395209.

The spelling of 812125602 in words is "eight hundred twelve million, one hundred twenty-five thousand, six hundred two".