121489644 has 12 divisors (see below), whose sum is σ = 283475864. Its totient is φ = 40496544.

The previous prime is 121489639. The next prime is 121489679. The reversal of 121489644 is 446984121.

It is a tau number, because it is divible by the number of its divisors (12).

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, 5062057 + ... + 5062080.

Almost surely, 2^121489644 is an apocalyptic number.

It is an amenable number.

121489644 is an abundant number, since it is smaller than the sum of its proper divisors (161986220).

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

121489644 is a wasteful number, since it uses less digits than its factorization.

121489644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10124144 (or 10124142 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 121489644 is about 11022.2340748144. The cubic root of 121489644 is about 495.2750150173.

The spelling of 121489644 in words is "one hundred twenty-one million, four hundred eighty-nine thousand, six hundred forty-four".