122042540 has 24 divisors (see below), whose sum is σ = 256504752. Its totient is φ = 48776000.

The previous prime is 122042509. The next prime is 122042561. The reversal of 122042540 is 45240221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35915 + ... + 39165.

It is an arithmetic number, because the mean of its divisors is an integer number (10687698).

Almost surely, 2^122042540 is an apocalyptic number.

122042540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122042540 is an abundant number, since it is smaller than the sum of its proper divisors (134462212).

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

122042540 is a wasteful number, since it uses less digits than its factorization.

122042540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5137 (or 5135 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 122042540 is about 11047.2865446679. The cubic root of 122042540 is about 496.0252057517.

Adding to 122042540 its reverse (45240221), we get a palindrome (167282761).

The spelling of 122042540 in words is "one hundred twenty-two million, forty-two thousand, five hundred forty".