121931425 has 48 divisors (see below), whose sum is σ = 190737792. Its totient is φ = 75110400.

The previous prime is 121931419. The next prime is 121931437. The reversal of 121931425 is 524139121.

It is not a de Polignac number, because 121931425 - 2⁵ = 121931393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121931393 and 121931402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 186399 + ... + 187051.

It is an arithmetic number, because the mean of its divisors is an integer number (3973704).

Almost surely, 2^121931425 is an apocalyptic number.

It is an amenable number.

121931425 is a deficient number, since it is larger than the sum of its proper divisors (68806367).

121931425 is a wasteful number, since it uses less digits than its factorization.

121931425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778 (or 773 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 121931425 is about 11042.2563364559. The cubic root of 121931425 is about 495.8746228043.

The spelling of 121931425 in words is "one hundred twenty-one million, nine hundred thirty-one thousand, four hundred twenty-five".