121672125 has 80 divisors (see below), whose sum is σ = 231721776. Its totient is φ = 63504000.

The previous prime is 121672123. The next prime is 121672141. The reversal of 121672125 is 521276121.

121672125 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in 8 ways, for example, as 37234404 + 84437721 = 6102^2 + 9189^2 .

It is not a de Polignac number, because 121672125 - 2¹ = 121672123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121672123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 617527 + ... + 617723.

Almost surely, 2^121672125 is an apocalyptic number.

121672125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121672125 is a deficient number, since it is larger than the sum of its proper divisors (110049651).

121672125 is an equidigital number, since it uses as much as digits as its factorization.

121672125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 266 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 121672125 is about 11030.5088277921. The cubic root of 121672125 is about 495.5228634881.

The spelling of 121672125 in words is "one hundred twenty-one million, six hundred seventy-two thousand, one hundred twenty-five".