122397905 has 16 divisors (see below), whose sum is σ = 176695680. Its totient is φ = 79512192.

The previous prime is 122397883. The next prime is 122397907. The reversal of 122397905 is 509793221.

It is a cyclic number.

It is not a de Polignac number, because 122397905 - 2¹⁰ = 122396881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122397907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91364 + ... + 92693.

It is an arithmetic number, because the mean of its divisors is an integer number (11043480).

Almost surely, 2^122397905 is an apocalyptic number.

It is an amenable number.

122397905 is a deficient number, since it is larger than the sum of its proper divisors (54297775).

122397905 is a wasteful number, since it uses less digits than its factorization.

122397905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184088.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 122397905 is about 11063.3586672403. The cubic root of 122397905 is about 496.5061833547.

The spelling of 122397905 in words is "one hundred twenty-two million, three hundred ninety-seven thousand, nine hundred five".