121644292 has 48 divisors (see below), whose sum is σ = 267144192. Its totient is φ = 47083680.

The previous prime is 121644277. The next prime is 121644293. The reversal of 121644292 is 292446121.

It is not an unprimeable number, because it can be changed into a prime (121644293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48993 + ... + 51415.

It is an arithmetic number, because the mean of its divisors is an integer number (5565504).

Almost surely, 2^121644292 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 121644292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133572096).

121644292 is an abundant number, since it is smaller than the sum of its proper divisors (145499900).

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

121644292 is a wasteful number, since it uses less digits than its factorization.

121644292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2608 (or 2606 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 121644292 is about 11029.2471184574. The cubic root of 121644292 is about 495.4850763076.

The spelling of 121644292 in words is "one hundred twenty-one million, six hundred forty-four thousand, two hundred ninety-two".