115567621 has 8 divisors (see below), whose sum is σ = 124782840. Its totient is φ = 106398912.

The previous prime is 115567619. The next prime is 115567631. The reversal of 115567621 is 126765511.

It can be written as a sum of positive squares in 4 ways, for example, as 1718721 + 113848900 = 1311^2 + 10670^2 .

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 115567621 - 2¹ = 115567619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115567601) 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, 6370 + ... + 16483.

It is an arithmetic number, because the mean of its divisors is an integer number (15597855).

Almost surely, 2^115567621 is an apocalyptic number.

It is an amenable number.

115567621 is a deficient number, since it is larger than the sum of its proper divisors (9215219).

115567621 is a wasteful number, since it uses less digits than its factorization.

115567621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23255.

The product of its digits is 12600, while the sum is 34.

The square root of 115567621 is about 10750.2381834078. The cubic root of 115567621 is about 487.0931899635.

The spelling of 115567621 in words is "one hundred fifteen million, five hundred sixty-seven thousand, six hundred twenty-one".