115510421 has 8 divisors (see below), whose sum is σ = 124606104. Its totient is φ = 106444800.

The previous prime is 115510391. The next prime is 115510441. The reversal of 115510421 is 124015511.

It can be written as a sum of positive squares in 4 ways, for example, as 8491396 + 107019025 = 2914^2 + 10345^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115510421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115510393 and 115510402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115510441) 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 7 ways as a sum of consecutive naturals, for example, 821 + ... + 15221.

It is an arithmetic number, because the mean of its divisors is an integer number (15575763).

Almost surely, 2^115510421 is an apocalyptic number.

It is an amenable number.

115510421 is a deficient number, since it is larger than the sum of its proper divisors (9095683).

115510421 is a wasteful number, since it uses less digits than its factorization.

115510421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15031.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 115510421 is about 10747.5774479647. The cubic root of 115510421 is about 487.0128147159.

Adding to 115510421 its reverse (124015511), we get a palindrome (239525932).

The spelling of 115510421 in words is "one hundred fifteen million, five hundred ten thousand, four hundred twenty-one".