122857560 has 160 divisors (see below), whose sum is σ = 472016160. Its totient is φ = 28076544.

The previous prime is 122857549. The next prime is 122857571. The reversal of 122857560 is 65758221.

It is a happy number.

122857560 is a `hidden beast` number, since 1 + 2 + 28 + 575 + 60 = 666.

It is an interprime number because it is at equal distance from previous prime (122857549) and next prime (122857571).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 19972 + ... + 25388.

It is an arithmetic number, because the mean of its divisors is an integer number (2950101).

Almost surely, 2^122857560 is an apocalyptic number.

122857560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122857560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236008080).

122857560 is an abundant number, since it is smaller than the sum of its proper divisors (349158600).

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

122857560 is a wasteful number, since it uses less digits than its factorization.

122857560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5447 (or 5434 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 122857560 is about 11084.1129550361. The cubic root of 122857560 is about 497.1269359603.

The spelling of 122857560 in words is "one hundred twenty-two million, eight hundred fifty-seven thousand, five hundred sixty".