121506440 has 32 divisors (see below), whose sum is σ = 298244160. Its totient is φ = 44184000.

The previous prime is 121506419. The next prime is 121506457. The reversal of 121506440 is 44605121.

It is a super-2 number, since 2×121506440² = 29527629922947200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137636 + ... + 138515.

It is an arithmetic number, because the mean of its divisors is an integer number (9320130).

Almost surely, 2^121506440 is an apocalyptic number.

121506440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121506440 is an abundant number, since it is smaller than the sum of its proper divisors (176737720).

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

121506440 is a wasteful number, since it uses less digits than its factorization.

121506440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276173 (or 276169 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 121506440 is about 11022.9959629857. The cubic root of 121506440 is about 495.2978379662.

The spelling of 121506440 in words is "one hundred twenty-one million, five hundred six thousand, four hundred forty".