122161540 has 24 divisors (see below), whose sum is σ = 258390720. Its totient is φ = 48511968.

The previous prime is 122161537. The next prime is 122161549. The reversal of 122161540 is 45161221.

It is not an unprimeable number, because it can be changed into a prime (122161549) 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, 19192 + ... + 24751.

It is an arithmetic number, because the mean of its divisors is an integer number (10766280).

Almost surely, 2^122161540 is an apocalyptic number.

122161540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122161540 is an abundant number, since it is smaller than the sum of its proper divisors (136229180).

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

122161540 is a wasteful number, since it uses less digits than its factorization.

122161540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44091 (or 44089 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 122161540 is about 11052.6711703552. The cubic root of 122161540 is about 496.1863731193.

The spelling of 122161540 in words is "one hundred twenty-two million, one hundred sixty-one thousand, five hundred forty".