115425421 has 4 divisors (see below), whose sum is σ = 115652700. Its totient is φ = 115198144.

The previous prime is 115425419. The next prime is 115425449. The reversal of 115425421 is 124524511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47955625 + 67469796 = 6925^2 + 8214^2 .

It is a cyclic number.

It is not a de Polignac number, because 115425421 - 2¹ = 115425419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115425451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112876 + ... + 113893.

It is an arithmetic number, because the mean of its divisors is an integer number (28913175).

Almost surely, 2^115425421 is an apocalyptic number.

It is an amenable number.

115425421 is a deficient number, since it is larger than the sum of its proper divisors (227279).

115425421 is an equidigital number, since it uses as much as digits as its factorization.

115425421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227278.

The product of its digits is 1600, while the sum is 25.

The square root of 115425421 is about 10743.6223407192. The cubic root of 115425421 is about 486.8933269473.

Adding to 115425421 its reverse (124524511), we get a palindrome (239949932).

The spelling of 115425421 in words is "one hundred fifteen million, four hundred twenty-five thousand, four hundred twenty-one".