122599620 has 216 divisors, whose sum is σ = 441226968. Its totient is φ = 27371520.

The previous prime is 122599619. The next prime is 122599627. The reversal of 122599620 is 26995221.

It is a happy number.

122599620 is a `hidden beast` number, since 1 + 2 + 2 + 599 + 62 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1115136 + 121484484 = 1056^2 + 11022^2 .

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

It is not an unprimeable number, because it can be changed into a prime (122599627) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 282924 + ... + 283356.

Almost surely, 2^122599620 is an apocalyptic number.

122599620 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 122599620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220613484).

122599620 is an abundant number, since it is smaller than the sum of its proper divisors (318627348).

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

122599620 is a wasteful number, since it uses less digits than its factorization.

122599620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 122599620 is about 11072.4712688722. The cubic root of 122599620 is about 496.7787854524.

The spelling of 122599620 in words is "one hundred twenty-two million, five hundred ninety-nine thousand, six hundred twenty".