115401521 has 4 divisors (see below), whose sum is σ = 115425012. Its totient is φ = 115378032.

The previous prime is 115401467. The next prime is 115401529. The reversal of 115401521 is 125104511.

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 16120225 + 99281296 = 4015^2 + 9964^2 .

It is a cyclic number.

It is not a de Polignac number, because 115401521 - 2¹⁰ = 115400497 is a prime.

It is a super-2 number, since 2×115401521² = 26635022098226882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115401493 and 115401502.

It is not an unprimeable number, because it can be changed into a prime (115401529) 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 3 ways as a sum of consecutive naturals, for example, 1250 + ... + 15243.

It is an arithmetic number, because the mean of its divisors is an integer number (28856253).

Almost surely, 2^115401521 is an apocalyptic number.

It is an amenable number.

115401521 is a deficient number, since it is larger than the sum of its proper divisors (23491).

115401521 is an equidigital number, since it uses as much as digits as its factorization.

115401521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23490.

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

The square root of 115401521 is about 10742.5099953409. The cubic root of 115401521 is about 486.8597192328.

The spelling of 115401521 in words is "one hundred fifteen million, four hundred one thousand, five hundred twenty-one".