122157290 has 16 divisors (see below), whose sum is σ = 220078080. Its totient is φ = 48819600.

The previous prime is 122157271. The next prime is 122157311. The reversal of 122157290 is 92751221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8015 + ... + 17565.

It is an arithmetic number, because the mean of its divisors is an integer number (13754880).

Almost surely, 2^122157290 is an apocalyptic number.

122157290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122157290 is a deficient number, since it is larger than the sum of its proper divisors (97920790).

122157290 is a wasteful number, since it uses less digits than its factorization.

122157290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10837.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 122157290 is about 11052.4789074669. The cubic root of 122157290 is about 496.1806189445.

The spelling of 122157290 in words is "one hundred twenty-two million, one hundred fifty-seven thousand, two hundred ninety".