1081457081 has 8 divisors (see below), whose sum is σ = 1093749384. Its totient is φ = 1069234560.

The previous prime is 1081457059. The next prime is 1081457101. The reversal of 1081457081 is 1807541801.

It can be written as a sum of positive squares in 4 ways, for example, as 13213225 + 1068243856 = 3635^2 + 32684^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1081457081 - 2²⁶ = 1014348217 is a prime.

It is a super-2 number, since 2×1081457081² = 2339098836090081122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1081457051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14045 + ... + 48581.

It is an arithmetic number, because the mean of its divisors is an integer number (136718673).

Almost surely, 2^1081457081 is an apocalyptic number.

It is an amenable number.

1081457081 is a deficient number, since it is larger than the sum of its proper divisors (12292303).

1081457081 is a wasteful number, since it uses less digits than its factorization.

1081457081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34891.

The product of its (nonzero) digits is 8960, while the sum is 35.

The square root of 1081457081 is about 32885.5147595412. The cubic root of 1081457081 is about 1026.4467631542.

Adding to 1081457081 its reverse (1807541801), we get a palindrome (2888998882).

The spelling of 1081457081 in words is "one billion, eighty-one million, four hundred fifty-seven thousand, eighty-one".