121645056 has 96 divisors (see below), whose sum is σ = 349483680. Its totient is φ = 37404672.

The previous prime is 121645037. The next prime is 121645057. The reversal of 121645056 is 650546121.

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

It is not an unprimeable number, because it can be changed into a prime (121645057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79111 + ... + 80633.

It is an arithmetic number, because the mean of its divisors is an integer number (3640455).

Almost surely, 2^121645056 is an apocalyptic number.

121645056 is a gapful number since it is divisible by the number (16) 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 121645056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174741840).

121645056 is an abundant number, since it is smaller than the sum of its proper divisors (227838624).

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

121645056 is a wasteful number, since it uses less digits than its factorization.

121645056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561 (or 1541 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 121645056 is about 11029.2817535867. The cubic root of 121645056 is about 495.4861136211.

The spelling of 121645056 in words is "one hundred twenty-one million, six hundred forty-five thousand, fifty-six".