102605812 has 12 divisors (see below), whose sum is σ = 190122660. Its totient is φ = 48285056.

The previous prime is 102605809. The next prime is 102605813. The reversal of 102605812 is 218506201.

It can be written as a sum of positive squares in 2 ways, for example, as 90744676 + 11861136 = 9526^2 + 3444^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102605813) 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, 754387 + ... + 754522.

It is an arithmetic number, because the mean of its divisors is an integer number (15843555).

Almost surely, 2^102605812 is an apocalyptic number.

It is an amenable number.

102605812 is a deficient number, since it is larger than the sum of its proper divisors (87516848).

102605812 is a wasteful number, since it uses less digits than its factorization.

102605812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508930 (or 1508928 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 102605812 is about 10129.4526999241. The cubic root of 102605812 is about 468.1560647845.

The spelling of 102605812 in words is "one hundred two million, six hundred five thousand, eight hundred twelve".