122491906 has 16 divisors (see below), whose sum is σ = 187272000. Its totient is φ = 60072688.

The previous prime is 122491903. The next prime is 122491909. The reversal of 122491906 is 609194221.

It is an interprime number because it is at equal distance from previous prime (122491903) and next prime (122491909).

It is not an unprimeable number, because it can be changed into a prime (122491903) 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, 69816 + ... + 71548.

It is an arithmetic number, because the mean of its divisors is an integer number (11704500).

Almost surely, 2^122491906 is an apocalyptic number.

122491906 is a deficient number, since it is larger than the sum of its proper divisors (64780094).

122491906 is a wasteful number, since it uses less digits than its factorization.

122491906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 122491906 is about 11067.6061549009. The cubic root of 122491906 is about 496.6332556137.

The spelling of 122491906 in words is "one hundred twenty-two million, four hundred ninety-one thousand, nine hundred six".