121681625 has 32 divisors (see below), whose sum is σ = 165355008. Its totient is φ = 88862400.

The previous prime is 121681607. The next prime is 121681639. The reversal of 121681625 is 526186121.

It is not a de Polignac number, because 121681625 - 2⁶ = 121681561 is a prime.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 121681591 and 121681600.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167012 + ... + 167738.

It is an arithmetic number, because the mean of its divisors is an integer number (5167344).

Almost surely, 2^121681625 is an apocalyptic number.

It is an amenable number.

121681625 is a deficient number, since it is larger than the sum of its proper divisors (43673383).

121681625 is a wasteful number, since it uses less digits than its factorization.

121681625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858 (or 848 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 121681625 is about 11030.9394432206. The cubic root of 121681625 is about 495.5357597443.

The spelling of 121681625 in words is "one hundred twenty-one million, six hundred eighty-one thousand, six hundred twenty-five".