121545125 has 16 divisors (see below), whose sum is σ = 163358832. Its totient is φ = 89755200.

The previous prime is 121545101. The next prime is 121545139. The reversal of 121545125 is 521545121.

It can be written as a sum of positive squares in 8 ways, for example, as 96314596 + 25230529 = 9814^2 + 5023^2 .

It is a de Polignac number, because none of the positive numbers 2^k-121545125 is a prime.

It is a super-2 number, since 2×121545125² = 29546434822531250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121545094 and 121545103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35774 + ... + 39023.

It is an arithmetic number, because the mean of its divisors is an integer number (10209927).

Almost surely, 2^121545125 is an apocalyptic number.

It is an amenable number.

121545125 is a deficient number, since it is larger than the sum of its proper divisors (41813707).

121545125 is an equidigital number, since it uses as much as digits as its factorization.

121545125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74825 (or 74815 counting only the distinct ones).

The product of its digits is 2000, while the sum is 26.

The square root of 121545125 is about 11024.7505640717. The cubic root of 121545125 is about 495.3503963979.

The spelling of 121545125 in words is "one hundred twenty-one million, five hundred forty-five thousand, one hundred twenty-five".