1418681081 has 4 divisors (see below), whose sum is σ = 1419598500. Its totient is φ = 1417763664.

The previous prime is 1418681053. The next prime is 1418681111. The reversal of 1418681081 is 1801868141.

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 1043871481 + 374809600 = 32309^2 + 19360^2 .

It is a cyclic number.

It is not a de Polignac number, because 1418681081 - 2¹⁰ = 1418680057 is a prime.

It is a super-2 number, since 2×1418681081² = 4025312019174657122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1418681021) 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, 456386 + ... + 459483.

It is an arithmetic number, because the mean of its divisors is an integer number (354899625).

Almost surely, 2^1418681081 is an apocalyptic number.

It is an amenable number.

1418681081 is a deficient number, since it is larger than the sum of its proper divisors (917419).

1418681081 is an equidigital number, since it uses as much as digits as its factorization.

1418681081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917418.

The product of its (nonzero) digits is 12288, while the sum is 38.

The square root of 1418681081 is about 37665.3830592495. The cubic root of 1418681081 is about 1123.6427631777.

The spelling of 1418681081 in words is "one billion, four hundred eighteen million, six hundred eighty-one thousand, eighty-one".