121541625 has 24 divisors (see below), whose sum is σ = 219101064. Its totient is φ = 64821600.

The previous prime is 121541617. The next prime is 121541627. The reversal of 121541625 is 526145121.

It can be written as a sum of positive squares in 4 ways, for example, as 20358144 + 101183481 = 4512^2 + 10059^2 .

It is not a de Polignac number, because 121541625 - 2³ = 121541617 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (121541627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52894 + ... + 55143.

It is an arithmetic number, because the mean of its divisors is an integer number (9129211).

Almost surely, 2^121541625 is an apocalyptic number.

121541625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121541625 is a deficient number, since it is larger than the sum of its proper divisors (97559439).

121541625 is a wasteful number, since it uses less digits than its factorization.

121541625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108058 (or 108045 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 121541625 is about 11024.5918291790. The cubic root of 121541625 is about 495.3456416672.

Adding to 121541625 its reverse (526145121), we get a palindrome (647686746).

The spelling of 121541625 in words is "one hundred twenty-one million, five hundred forty-one thousand, six hundred twenty-five".