121632645 has 16 divisors (see below), whose sum is σ = 196015680. Its totient is φ = 64402944.

The previous prime is 121632631. The next prime is 121632649. The reversal of 121632645 is 546236121.

It is not a de Polignac number, because 121632645 - 2⁴ = 121632629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121632649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27084 + ... + 31253.

It is an arithmetic number, because the mean of its divisors is an integer number (12250980).

Almost surely, 2^121632645 is an apocalyptic number.

121632645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121632645 is a deficient number, since it is larger than the sum of its proper divisors (74383035).

121632645 is a wasteful number, since it uses less digits than its factorization.

121632645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58484.

The product of its digits is 8640, while the sum is 30.

The square root of 121632645 is about 11028.7191006028. The cubic root of 121632645 is about 495.4692621696.

Adding to 121632645 its reverse (546236121), we get a palindrome (667868766).

The spelling of 121632645 in words is "one hundred twenty-one million, six hundred thirty-two thousand, six hundred forty-five".