116142581 has 4 divisors (see below), whose sum is σ = 117778464. Its totient is φ = 114506700.

The previous prime is 116142577. The next prime is 116142601. The reversal of 116142581 is 185241611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 116142581 - 2² = 116142577 is a prime.

It is a super-2 number, since 2×116142581² = 26978198242683122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116142541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 817835 + ... + 817976.

It is an arithmetic number, because the mean of its divisors is an integer number (29444616).

Almost surely, 2^116142581 is an apocalyptic number.

It is an amenable number.

116142581 is a deficient number, since it is larger than the sum of its proper divisors (1635883).

116142581 is an equidigital number, since it uses as much as digits as its factorization.

116142581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635882.

The product of its digits is 1920, while the sum is 29.

The square root of 116142581 is about 10776.9467382928. The cubic root of 116142581 is about 487.8996325098.

The spelling of 116142581 in words is "one hundred sixteen million, one hundred forty-two thousand, five hundred eighty-one".