121644942 has 8 divisors (see below), whose sum is σ = 243289896. Its totient is φ = 40548312.

The previous prime is 121644931. The next prime is 121645019. The reversal of 121644942 is 249446121.

It is a sphenic number, since it is the product of 3 distinct primes.

121644942 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 10137073 + ... + 10137084.

It is an arithmetic number, because the mean of its divisors is an integer number (30411237).

Almost surely, 2^121644942 is an apocalyptic number.

121644942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121644942 is a wasteful number, since it uses less digits than its factorization.

121644942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20274162.

The product of its digits is 13824, while the sum is 33.

The square root of 121644942 is about 11029.2765855245. The cubic root of 121644942 is about 495.4859588390.

The spelling of 121644942 in words is "one hundred twenty-one million, six hundred forty-four thousand, nine hundred forty-two".