121501825 has 12 divisors (see below), whose sum is σ = 151127728. Its totient is φ = 96901200.

The previous prime is 121501823. The next prime is 121501841. The reversal of 121501825 is 528105121.

It is not a de Polignac number, because 121501825 - 2¹ = 121501823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121501825.

It is not an unprimeable number, because it can be changed into a prime (121501823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 934 + ... + 15616.

Almost surely, 2^121501825 is an apocalyptic number.

It is an amenable number.

121501825 is a deficient number, since it is larger than the sum of its proper divisors (29625903).

121501825 is a wasteful number, since it uses less digits than its factorization.

121501825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15024 (or 15019 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 121501825 is about 11022.7866258946. The cubic root of 121501825 is about 495.2915671643.

Adding to 121501825 its reverse (528105121), we get a palindrome (649606946).

The spelling of 121501825 in words is "one hundred twenty-one million, five hundred one thousand, eight hundred twenty-five".