122591868 has 24 divisors (see below), whose sum is σ = 326911872. Its totient is φ = 35026224.

The previous prime is 122591849. The next prime is 122591869. The reversal of 122591868 is 868195221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122591869) 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, 729630 + ... + 729797.

It is an arithmetic number, because the mean of its divisors is an integer number (13621328).

Almost surely, 2^122591868 is an apocalyptic number.

It is an amenable number.

122591868 is an abundant number, since it is smaller than the sum of its proper divisors (204320004).

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

122591868 is a wasteful number, since it uses less digits than its factorization.

122591868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459441 (or 1459439 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 122591868 is about 11072.1212059840. The cubic root of 122591868 is about 496.7683147557.

The spelling of 122591868 in words is "one hundred twenty-two million, five hundred ninety-one thousand, eight hundred sixty-eight".