115573621 has 2 divisors, whose sum is σ = 115573622. Its totient is φ = 115573620.

The previous prime is 115573583. The next prime is 115573631. The reversal of 115573621 is 126375511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60606225 + 54967396 = 7785^2 + 7414^2 .

It is an emirp because it is prime and its reverse (126375511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115573621 - 2⁹ = 115573109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115573631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57786810 + 57786811.

It is an arithmetic number, because the mean of its divisors is an integer number (57786811).

Almost surely, 2^115573621 is an apocalyptic number.

It is an amenable number.

115573621 is a deficient number, since it is larger than the sum of its proper divisors (1).

115573621 is an equidigital number, since it uses as much as digits as its factorization.

115573621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6300, while the sum is 31.

The square root of 115573621 is about 10750.5172433702. The cubic root of 115573621 is about 487.1016193965.

The spelling of 115573621 in words is "one hundred fifteen million, five hundred seventy-three thousand, six hundred twenty-one".