121506444 has 72 divisors (see below), whose sum is σ = 324870000. Its totient is φ = 38185344.

The previous prime is 121506419. The next prime is 121506457. The reversal of 121506444 is 444605121.

121506444 is a `hidden beast` number, since 1 + 2 + 15 + 0 + 644 + 4 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238462 + ... + 238970.

Almost surely, 2^121506444 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 121506444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162435000).

121506444 is an abundant number, since it is smaller than the sum of its proper divisors (203363556).

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

121506444 is a wasteful number, since it uses less digits than its factorization.

121506444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887 (or 882 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 121506444 is about 11022.9961444246. The cubic root of 121506444 is about 495.2978434013.

The spelling of 121506444 in words is "one hundred twenty-one million, five hundred six thousand, four hundred forty-four".