121724256 has 24 divisors (see below), whose sum is σ = 319526424. Its totient is φ = 40574720.

The previous prime is 121724249. The next prime is 121724269. The reversal of 121724256 is 652427121.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

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, 633885 + ... + 634076.

It is an arithmetic number, because the mean of its divisors is an integer number (13313601).

Almost surely, 2^121724256 is an apocalyptic number.

121724256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121724256 is an abundant number, since it is smaller than the sum of its proper divisors (197802168).

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

121724256 is a wasteful number, since it uses less digits than its factorization.

121724256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267974 (or 1267966 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 121724256 is about 11032.8716116884. The cubic root of 121724256 is about 495.5936230916.

The spelling of 121724256 in words is "one hundred twenty-one million, seven hundred twenty-four thousand, two hundred fifty-six".