121942859 has 4 divisors (see below), whose sum is σ = 122104704. Its totient is φ = 121781016.

The previous prime is 121942841. The next prime is 121942907. The reversal of 121942859 is 958249121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121942859 - 2¹⁶ = 121877323 is a prime.

It is a super-2 number, since 2×121942859² = 29740121722187762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121942259) 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, 79787 + ... + 81300.

It is an arithmetic number, because the mean of its divisors is an integer number (30526176).

Almost surely, 2^121942859 is an apocalyptic number.

121942859 is a deficient number, since it is larger than the sum of its proper divisors (161845).

121942859 is an equidigital number, since it uses as much as digits as its factorization.

121942859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161844.

The product of its digits is 51840, while the sum is 41.

The square root of 121942859 is about 11042.7740627073. The cubic root of 121942859 is about 495.8901223722.

The spelling of 121942859 in words is "one hundred twenty-one million, nine hundred forty-two thousand, eight hundred fifty-nine".