121635425 has 48 divisors (see below), whose sum is σ = 168739200. Its totient is φ = 86553600.

The previous prime is 121635419. The next prime is 121635427. The reversal of 121635425 is 524536121.

It is not a de Polignac number, because 121635425 - 2⁶ = 121635361 is a prime.

It is a super-2 number, since 2×121635425² = 29590353229861250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (121635427) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 875006 + ... + 875144.

It is an arithmetic number, because the mean of its divisors is an integer number (3515400).

Almost surely, 2^121635425 is an apocalyptic number.

It is an amenable number.

121635425 is a deficient number, since it is larger than the sum of its proper divisors (47103775).

121635425 is a wasteful number, since it uses less digits than its factorization.

121635425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 261 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 121635425 is about 11028.8451344644. The cubic root of 121635425 is about 495.4730369074.

The spelling of 121635425 in words is "one hundred twenty-one million, six hundred thirty-five thousand, four hundred twenty-five".