121925439 has 16 divisors (see below), whose sum is σ = 181064800. Its totient is φ = 81088128.

The previous prime is 121925429. The next prime is 121925443. The reversal of 121925439 is 934529121.

121925439 is a `hidden beast` number, since 1 + 21 + 92 + 543 + 9 = 666.

It is not a de Polignac number, because 121925439 - 2⁵ = 121925407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121925429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6477 + ... + 16905.

It is an arithmetic number, because the mean of its divisors is an integer number (11316550).

Almost surely, 2^121925439 is an apocalyptic number.

121925439 is a deficient number, since it is larger than the sum of its proper divisors (59139361).

121925439 is a wasteful number, since it uses less digits than its factorization.

121925439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10871 (or 10865 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 121925439 is about 11041.9852834533. The cubic root of 121925439 is about 495.8665079860.

The spelling of 121925439 in words is "one hundred twenty-one million, nine hundred twenty-five thousand, four hundred thirty-nine".