115503421 has 4 divisors (see below), whose sum is σ = 126003744. Its totient is φ = 105003100.

The previous prime is 115503371. The next prime is 115503449. The reversal of 115503421 is 124305511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 115503421 - 2⁹ = 115502909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115503392 and 115503401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115503481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5250145 + ... + 5250166.

It is an arithmetic number, because the mean of its divisors is an integer number (31500936).

Almost surely, 2^115503421 is an apocalyptic number.

115503421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

115503421 is a deficient number, since it is larger than the sum of its proper divisors (10500323).

115503421 is a wasteful number, since it uses less digits than its factorization.

115503421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10500322.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 115503421 is about 10747.2517882480. The cubic root of 115503421 is about 487.0029767621.

Adding to 115503421 its reverse (124305511), we get a palindrome (239808932).

The spelling of 115503421 in words is "one hundred fifteen million, five hundred three thousand, four hundred twenty-one".