122555540 has 12 divisors (see below), whose sum is σ = 257366676. Its totient is φ = 49022208.

The previous prime is 122555513. The next prime is 122555591. The reversal of 122555540 is 45555221.

It can be written as a sum of positive squares in 2 ways, for example, as 31047184 + 91508356 = 5572^2 + 9566^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3063869 + ... + 3063908.

It is an arithmetic number, because the mean of its divisors is an integer number (21447223).

Almost surely, 2^122555540 is an apocalyptic number.

122555540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122555540 is an abundant number, since it is smaller than the sum of its proper divisors (134811136).

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

122555540 is a wasteful number, since it uses less digits than its factorization.

122555540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6127786 (or 6127784 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 122555540 is about 11070.4805677080. The cubic root of 122555540 is about 496.7192403145.

It can be divided in two parts, 1225 and 55540, that added together give a palindrome (56765).

The spelling of 122555540 in words is "one hundred twenty-two million, five hundred fifty-five thousand, five hundred forty".