121632725 has 12 divisors (see below), whose sum is σ = 151596324. Its totient is φ = 96808320.

The previous prime is 121632713. The next prime is 121632733. The reversal of 121632725 is 527236121.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 23107249 + 98525476 = 4807^2 + 9926^2 .

It is not a de Polignac number, because 121632725 - 2²² = 117438421 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7424 + ... + 17273.

It is an arithmetic number, because the mean of its divisors is an integer number (12633027).

Almost surely, 2^121632725 is an apocalyptic number.

It is an amenable number.

121632725 is a deficient number, since it is larger than the sum of its proper divisors (29963599).

121632725 is a wasteful number, since it uses less digits than its factorization.

121632725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24904 (or 24899 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

The square root of 121632725 is about 11028.7227274966. The cubic root of 121632725 is about 495.4693707959.

Adding to 121632725 its reverse (527236121), we get a palindrome (648868846).

The spelling of 121632725 in words is "one hundred twenty-one million, six hundred thirty-two thousand, seven hundred twenty-five".