122155869 has 16 divisors (see below), whose sum is σ = 178168320. Its totient is φ = 73830960.

The previous prime is 122155861. The next prime is 122155871. The reversal of 122155869 is 968551221.

It is not a de Polignac number, because 122155869 - 2³ = 122155861 is a prime.

It is a super-2 number, since 2×122155869² = 29844112662290322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122155861) 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, 7624 + ... + 17390.

It is an arithmetic number, because the mean of its divisors is an integer number (11135520).

Almost surely, 2^122155869 is an apocalyptic number.

It is an amenable number.

122155869 is a deficient number, since it is larger than the sum of its proper divisors (56012451).

122155869 is a wasteful number, since it uses less digits than its factorization.

122155869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10160.

The product of its digits is 43200, while the sum is 39.

The square root of 122155869 is about 11052.4146230586. The cubic root of 122155869 is about 496.1786949895.

The spelling of 122155869 in words is "one hundred twenty-two million, one hundred fifty-five thousand, eight hundred sixty-nine".