121787625 has 32 divisors (see below), whose sum is σ = 213333120. Its totient is φ = 61531200.

The previous prime is 121787621. The next prime is 121787641. The reversal of 121787625 is 526787121.

It is not a de Polignac number, because 121787625 - 2² = 121787621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121787621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1422 + ... + 15671.

It is an arithmetic number, because the mean of its divisors is an integer number (6666660).

Almost surely, 2^121787625 is an apocalyptic number.

121787625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121787625 is a deficient number, since it is larger than the sum of its proper divisors (91545495).

121787625 is a wasteful number, since it uses less digits than its factorization.

121787625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17130 (or 17120 counting only the distinct ones).

The product of its digits is 47040, while the sum is 39.

The square root of 121787625 is about 11035.7430651497. The cubic root of 121787625 is about 495.6796093064.

The spelling of 121787625 in words is "one hundred twenty-one million, seven hundred eighty-seven thousand, six hundred twenty-five".