115621 has 8 divisors (see below), whose sum is σ = 131904. Its totient is φ = 100320.

The previous prime is 115613. The next prime is 115631. The reversal of 115621 is 126511.

It is a happy number.

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

It is not a de Polignac number, because 115621 - 2³ = 115613 is a prime.

It is a Duffinian number.

115621 is a modest number, since divided by 621 gives 115 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 115595 and 115604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115601) 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, 25 + ... + 481.

It is an arithmetic number, because the mean of its divisors is an integer number (16488).

2¹¹⁵⁶²¹ is an apocalyptic number.

115621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

115621 is a deficient number, since it is larger than the sum of its proper divisors (16283).

115621 is a wasteful number, since it uses less digits than its factorization.

115621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491.

The product of its digits is 60, while the sum is 16.

The square root of 115621 is about 340.0308809505. The cubic root of 115621 is about 48.7168172169.

The spelling of 115621 in words is "one hundred fifteen thousand, six hundred twenty-one".