121760640 has 96 divisors (see below), whose sum is σ = 420474600. Its totient is φ = 32467968.

The previous prime is 121760627. The next prime is 121760699. The reversal of 121760640 is 46067121.

121760640 is a `hidden beast` number, since 1 + 2 + 17 + 6 + 0 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4810 + ... + 16329.

Almost surely, 2^121760640 is an apocalyptic number.

121760640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121760640 is an abundant number, since it is smaller than the sum of its proper divisors (298713960).

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

121760640 is a wasteful number, since it uses less digits than its factorization.

121760640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21164 (or 21149 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 121760640 is about 11034.5203792462. The cubic root of 121760640 is about 495.6429966585.

It can be divided in two parts, 121 and 760640, that added together give a triangular number (760761 = T₁₂₃₃).

The spelling of 121760640 in words is "one hundred twenty-one million, seven hundred sixty thousand, six hundred forty".