121872242 has 8 divisors (see below), whose sum is σ = 182856432. Its totient is φ = 60920100.

The previous prime is 121872241. The next prime is 121872287. The reversal of 121872242 is 242278121.

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

It is not an unprimeable number, because it can be changed into a prime (121872241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7517 + ... + 17327.

It is an arithmetic number, because the mean of its divisors is an integer number (22857054).

Almost surely, 2^121872242 is an apocalyptic number.

121872242 is a deficient number, since it is larger than the sum of its proper divisors (60984190).

121872242 is an equidigital number, since it uses as much as digits as its factorization.

121872242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16024.

The product of its digits is 3584, while the sum is 29.

The square root of 121872242 is about 11039.5761694007. The cubic root of 121872242 is about 495.7943807139.

The spelling of 121872242 in words is "one hundred twenty-one million, eight hundred seventy-two thousand, two hundred forty-two".