122187864 has 32 divisors (see below), whose sum is σ = 315325440. Its totient is φ = 39415200.

The previous prime is 122187859. The next prime is 122187889. The reversal of 122187864 is 468781221.

It is a happy number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 81372 + ... + 82859.

It is an arithmetic number, because the mean of its divisors is an integer number (9853920).

Almost surely, 2^122187864 is an apocalyptic number.

It is an amenable number.

122187864 is an abundant number, since it is smaller than the sum of its proper divisors (193137576).

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

122187864 is a wasteful number, since it uses less digits than its factorization.

122187864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164271 (or 164267 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 122187864 is about 11053.8619495631. The cubic root of 122187864 is about 496.2220108276. Note that the first 3 decimals are identical.

The spelling of 122187864 in words is "one hundred twenty-two million, one hundred eighty-seven thousand, eight hundred sixty-four".