122752578 has 64 divisors (see below), whose sum is σ = 281151360. Its totient is φ = 35417088.

The previous prime is 122752577. The next prime is 122752583. The reversal of 122752578 is 875257221.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (122752577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167100 + ... + 167832.

It is an arithmetic number, because the mean of its divisors is an integer number (4392990).

Almost surely, 2^122752578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122752578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140575680).

122752578 is an abundant number, since it is smaller than the sum of its proper divisors (158398782).

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

122752578 is a wasteful number, since it uses less digits than its factorization.

122752578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883.

The product of its digits is 78400, while the sum is 39.

The square root of 122752578 is about 11079.3762459806. The cubic root of 122752578 is about 496.9852969968.

The spelling of 122752578 in words is "one hundred twenty-two million, seven hundred fifty-two thousand, five hundred seventy-eight".