121485640 has 32 divisors (see below), whose sum is σ = 282771000. Its totient is φ = 46918144.

The previous prime is 121485577. The next prime is 121485641. The reversal of 121485640 is 46584121.

It can be written as a sum of positive squares in 4 ways, for example, as 119727364 + 1758276 = 10942^2 + 1326^2 .

It is not an unprimeable number, because it can be changed into a prime (121485641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51205 + ... + 53524.

Almost surely, 2^121485640 is an apocalyptic number.

121485640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121485640 is an abundant number, since it is smaller than the sum of its proper divisors (161285360).

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

121485640 is a wasteful number, since it uses less digits than its factorization.

121485640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104769 (or 104765 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 121485640 is about 11022.0524404486. The cubic root of 121485640 is about 495.2695739418.

The spelling of 121485640 in words is "one hundred twenty-one million, four hundred eighty-five thousand, six hundred forty".