121874640 has 80 divisors (see below), whose sum is σ = 390022656. Its totient is φ = 31449600.

The previous prime is 121874603. The next prime is 121874689. The reversal of 121874640 is 46478121.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 751 + ... + 15630.

Almost surely, 2^121874640 is an apocalyptic number.

121874640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121874640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195011328).

121874640 is an abundant number, since it is smaller than the sum of its proper divisors (268148016).

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

121874640 is a wasteful number, since it uses less digits than its factorization.

121874640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16428 (or 16422 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 121874640 is about 11039.6847781085. The cubic root of 121874640 is about 495.7976324993.

The spelling of 121874640 in words is "one hundred twenty-one million, eight hundred seventy-four thousand, six hundred forty".