122651442 has 64 divisors (see below), whose sum is σ = 280195200. Its totient is φ = 39755520.

The previous prime is 122651429. The next prime is 122651449. The reversal of 122651442 is 244156221.

122651442 is a `hidden beast` number, since 1 + 2 + 2 + 651 + 4 + 4 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (122651449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 436342 + ... + 436622.

It is an arithmetic number, because the mean of its divisors is an integer number (4378050).

Almost surely, 2^122651442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122651442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140097600).

122651442 is an abundant number, since it is smaller than the sum of its proper divisors (157543758).

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

122651442 is a wasteful number, since it uses less digits than its factorization.

122651442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 482 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 122651442 is about 11074.8111496314. The cubic root of 122651442 is about 496.8487705627.

The spelling of 122651442 in words is "one hundred twenty-two million, six hundred fifty-one thousand, four hundred forty-two".