115643541 has 16 divisors (see below), whose sum is σ = 168534464. Its totient is φ = 70101504.

The previous prime is 115643527. The next prime is 115643573. The reversal of 115643541 is 145346511.

It is a happy number.

It is not a de Polignac number, because 115643541 - 2¹⁴ = 115627157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 115643499 and 115643508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115643041) 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 15 ways as a sum of consecutive naturals, for example, 19516 + ... + 24741.

It is an arithmetic number, because the mean of its divisors is an integer number (10533404).

Almost surely, 2^115643541 is an apocalyptic number.

It is an amenable number.

115643541 is a deficient number, since it is larger than the sum of its proper divisors (52890923).

115643541 is a wasteful number, since it uses less digits than its factorization.

115643541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44340.

The product of its digits is 7200, while the sum is 30.

The square root of 115643541 is about 10753.7686882320. The cubic root of 115643541 is about 487.1998288871.

The spelling of 115643541 in words is "one hundred fifteen million, six hundred forty-three thousand, five hundred forty-one".