122781512 has 32 divisors (see below), whose sum is σ = 269227200. Its totient is φ = 51395904.

The previous prime is 122781509. The next prime is 122781517. The reversal of 122781512 is 215187221.

It is a super-2 number, since 2×122781512² = 30150599378012288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (122781517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23087 + ... + 27902.

It is an arithmetic number, because the mean of its divisors is an integer number (8413350).

Almost surely, 2^122781512 is an apocalyptic number.

It is an amenable number.

122781512 is an abundant number, since it is smaller than the sum of its proper divisors (146445688).

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

122781512 is a wasteful number, since it uses less digits than its factorization.

122781512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51045 (or 51041 counting only the distinct ones).

The product of its digits is 2240, while the sum is 29.

The square root of 122781512 is about 11080.6819284735. The cubic root of 122781512 is about 497.0243420503.

The spelling of 122781512 in words is "one hundred twenty-two million, seven hundred eighty-one thousand, five hundred twelve".