122553156 has 48 divisors (see below), whose sum is σ = 314572608. Its totient is φ = 37132480.

The previous prime is 122553143. The next prime is 122553157. The reversal of 122553156 is 651355221.

It is a happy number.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (122553157) 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 15 ways as a sum of consecutive naturals, for example, 12136 + ... + 19808.

It is an arithmetic number, because the mean of its divisors is an integer number (6553596).

Almost surely, 2^122553156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122553156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157286304).

122553156 is an abundant number, since it is smaller than the sum of its proper divisors (192019452).

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

122553156 is a wasteful number, since it uses less digits than its factorization.

122553156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7713 (or 7689 counting only the distinct ones).

The product of its digits is 9000, while the sum is 30.

The square root of 122553156 is about 11070.3728934485. The cubic root of 122553156 is about 496.7160194990.

The spelling of 122553156 in words is "one hundred twenty-two million, five hundred fifty-three thousand, one hundred fifty-six".