122491907 has 8 divisors (see below), whose sum is σ = 125583216. Its totient is φ = 119411712.

The previous prime is 122491903. The next prime is 122491909. The reversal of 122491907 is 709194221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122491907 - 2² = 122491903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122491903) by changing a digit.

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, 22343 + ... + 27279.

It is an arithmetic number, because the mean of its divisors is an integer number (15697902).

Almost surely, 2^122491907 is an apocalyptic number.

122491907 is a deficient number, since it is larger than the sum of its proper divisors (3091309).

122491907 is an equidigital number, since it uses as much as digits as its factorization.

122491907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5557.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 122491907 is about 11067.6062000778. The cubic root of 122491907 is about 496.6332569652.

The spelling of 122491907 in words is "one hundred twenty-two million, four hundred ninety-one thousand, nine hundred seven".