121532425 has 12 divisors (see below), whose sum is σ = 172229056. Its totient is φ = 83336400.

The previous prime is 121532423. The next prime is 121532429. The reversal of 121532425 is 524235121.

It is not a de Polignac number, because 121532425 - 2¹ = 121532423 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 121532425.

It is not an unprimeable number, because it can be changed into a prime (121532423) 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 11 ways as a sum of consecutive naturals, for example, 347061 + ... + 347410.

Almost surely, 2^121532425 is an apocalyptic number.

It is an amenable number.

121532425 is a deficient number, since it is larger than the sum of its proper divisors (50696631).

121532425 is an equidigital number, since it uses as much as digits as its factorization.

121532425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694488 (or 694483 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 121532425 is about 11024.1745722752. The cubic root of 121532425 is about 495.3331430824. Note that the first 3 decimals are identical.

Adding to 121532425 its reverse (524235121), we get a palindrome (645767546).

The spelling of 121532425 in words is "one hundred twenty-one million, five hundred thirty-two thousand, four hundred twenty-five".