121779744 has 48 divisors (see below), whose sum is σ = 320332320. Its totient is φ = 40509440.

The previous prime is 121779737. The next prime is 121779769. The reversal of 121779744 is 447977121.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 121779696 and 121779705.

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, 60547 + ... + 62525.

It is an arithmetic number, because the mean of its divisors is an integer number (6673590).

Almost surely, 2^121779744 is an apocalyptic number.

It is an amenable number.

121779744 is an abundant number, since it is smaller than the sum of its proper divisors (198552576).

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

121779744 is a wasteful number, since it uses less digits than its factorization.

121779744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633 (or 2625 counting only the distinct ones).

The product of its digits is 98784, while the sum is 42.

The square root of 121779744 is about 11035.3859923430. The cubic root of 121779744 is about 495.6689171000.

The spelling of 121779744 in words is "one hundred twenty-one million, seven hundred seventy-nine thousand, seven hundred forty-four".