122190915 has 64 divisors (see below), whose sum is σ = 247541760. Its totient is φ = 49991040.

The previous prime is 122190899. The next prime is 122190923. The reversal of 122190915 is 519091221.

It is a Cunningham number, because it is equal to 11054²-1.

It is not a de Polignac number, because 122190915 - 2⁴ = 122190899 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 76596 + ... + 78174.

It is an arithmetic number, because the mean of its divisors is an integer number (3867840).

Almost surely, 2^122190915 is an apocalyptic number.

122190915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

122190915 is an abundant number, since it is smaller than the sum of its proper divisors (125350845).

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

122190915 is a wasteful number, since it uses less digits than its factorization.

122190915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672.

The product of its (nonzero) digits is 1620, while the sum is 30.

The square root of 122190915 is about 11053.9999547675. Note that the first 4 decimals coincide. The cubic root of 122190915 is about 496.2261409725.

It can be divided in two parts, 12219091 and 5, that added together give a triangular number (12219096 = T₄₉₄₃).

The spelling of 122190915 in words is "one hundred twenty-two million, one hundred ninety thousand, nine hundred fifteen".