122506553 has 4 divisors (see below), whose sum is σ = 131930148. Its totient is φ = 113082960.

The previous prime is 122506511. The next prime is 122506567. The reversal of 122506553 is 355605221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18731584 + 103774969 = 4328^2 + 10187^2 .

It is a cyclic number.

It is not a de Polignac number, because 122506553 - 2¹⁰ = 122505529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122503553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4711778 + ... + 4711803.

It is an arithmetic number, because the mean of its divisors is an integer number (32982537).

Almost surely, 2^122506553 is an apocalyptic number.

122506553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

122506553 is a deficient number, since it is larger than the sum of its proper divisors (9423595).

122506553 is an equidigital number, since it uses as much as digits as its factorization.

122506553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9423594.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 122506553 is about 11068.2678409948. The cubic root of 122506553 is about 496.6530498396.

The spelling of 122506553 in words is "one hundred twenty-two million, five hundred six thousand, five hundred fifty-three".