121645024 has 48 divisors (see below), whose sum is σ = 253108800. Its totient is φ = 57455104.

The previous prime is 121645021. The next prime is 121645031. The reversal of 121645024 is 420546121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121645024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121645021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42222 + ... + 45010.

It is an arithmetic number, because the mean of its divisors is an integer number (5273100).

Almost surely, 2^121645024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121645024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126554400).

121645024 is an abundant number, since it is smaller than the sum of its proper divisors (131463776).

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

121645024 is a wasteful number, since it uses less digits than its factorization.

121645024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2875 (or 2867 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 121645024 is about 11029.2803029028. The cubic root of 121645024 is about 495.4860701735.

The spelling of 121645024 in words is "one hundred twenty-one million, six hundred forty-five thousand, twenty-four".