1012618081 has 4 divisors (see below), whose sum is σ = 1012740372. Its totient is φ = 1012495792.

The previous prime is 1012618001. The next prime is 1012618111. The reversal of 1012618081 is 1808162101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 109014481 + 903603600 = 10441^2 + 30060^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012618081 - 2⁷ = 1012617953 is a prime.

It is a super-2 number, since 2×1012618081² = 2050790755936245122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012618001) 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, 47746 + ... + 65611.

It is an arithmetic number, because the mean of its divisors is an integer number (253185093).

Almost surely, 2^1012618081 is an apocalyptic number.

It is an amenable number.

1012618081 is a deficient number, since it is larger than the sum of its proper divisors (122291).

1012618081 is an equidigital number, since it uses as much as digits as its factorization.

1012618081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122290.

The product of its (nonzero) digits is 768, while the sum is 28.

The square root of 1012618081 is about 31821.6605632076. The cubic root of 1012618081 is about 1004.1884593156.

The spelling of 1012618081 in words is "one billion, twelve million, six hundred eighteen thousand, eighty-one".