122021540 has 12 divisors (see below), whose sum is σ = 256245276. Its totient is φ = 48808608.

The previous prime is 122021527. The next prime is 122021561. The reversal of 122021540 is 45120221.

It can be written as a sum of positive squares in 2 ways, for example, as 85636516 + 36385024 = 9254^2 + 6032^2 .

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, 3050519 + ... + 3050558.

It is an arithmetic number, because the mean of its divisors is an integer number (21353773).

Almost surely, 2^122021540 is an apocalyptic number.

122021540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122021540 is an abundant number, since it is smaller than the sum of its proper divisors (134223736).

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

122021540 is a wasteful number, since it uses less digits than its factorization.

122021540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6101086 (or 6101084 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 122021540 is about 11046.3360441370. The cubic root of 122021540 is about 495.9967535774.

Adding to 122021540 its reverse (45120221), we get a palindrome (167141761).

The spelling of 122021540 in words is "one hundred twenty-two million, twenty-one thousand, five hundred forty".