121425929 has 16 divisors (see below), whose sum is σ = 129366720. Its totient is φ = 113789760.

The previous prime is 121425919. The next prime is 121425943. The reversal of 121425929 is 929524121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121425929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121425919) 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, 146414 + ... + 147240.

It is an arithmetic number, because the mean of its divisors is an integer number (8085420).

Almost surely, 2^121425929 is an apocalyptic number.

It is an amenable number.

121425929 is a deficient number, since it is larger than the sum of its proper divisors (7940791).

121425929 is an equidigital number, since it uses as much as digits as its factorization.

121425929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000.

The product of its digits is 12960, while the sum is 35.

The square root of 121425929 is about 11019.3434014918. The cubic root of 121425929 is about 495.1884178810.

The spelling of 121425929 in words is "one hundred twenty-one million, four hundred twenty-five thousand, nine hundred twenty-nine".