115520421 has 8 divisors (see below), whose sum is σ = 160724160. Its totient is φ = 73665152.

The previous prime is 115520417. The next prime is 115520441. The reversal of 115520421 is 124025511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115520421 - 2² = 115520417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115520441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 837036 + ... + 837173.

It is an arithmetic number, because the mean of its divisors is an integer number (20090520).

Almost surely, 2^115520421 is an apocalyptic number.

It is an amenable number.

115520421 is a deficient number, since it is larger than the sum of its proper divisors (45203739).

115520421 is a wasteful number, since it uses less digits than its factorization.

115520421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674235.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 115520421 is about 10748.0426590147. The cubic root of 115520421 is about 487.0268682462.

Adding to 115520421 its reverse (124025511), we get a palindrome (239545932).

The spelling of 115520421 in words is "one hundred fifteen million, five hundred twenty thousand, four hundred twenty-one".