120809812 has 6 divisors (see below), whose sum is σ = 211417178. Its totient is φ = 60404904.

The previous prime is 120809797. The next prime is 120809813. The reversal of 120809812 is 218908021.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 110544196 + 10265616 = 10514^2 + 3204^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120809813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15101223 + ... + 15101230.

Almost surely, 2^120809812 is an apocalyptic number.

It is an amenable number.

120809812 is a deficient number, since it is larger than the sum of its proper divisors (90607366).

120809812 is a wasteful number, since it uses less digits than its factorization.

120809812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30202457 (or 30202455 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 120809812 is about 10991.3516912161. The cubic root of 120809812 is about 494.3494661521.

The spelling of 120809812 in words is "one hundred twenty million, eight hundred nine thousand, eight hundred twelve".