1045851681 has 32 divisors (see below), whose sum is σ = 1650761728. Its totient is φ = 576357120.

The previous prime is 1045851671. The next prime is 1045851689. The reversal of 1045851681 is 1861585401.

It is not a de Polignac number, because 1045851681 - 2⁶ = 1045851617 is a prime.

It is a super-2 number, since 2×1045851681² = 2187611477301051522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1045851689) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197241 + ... + 202473.

It is an arithmetic number, because the mean of its divisors is an integer number (51586304).

Almost surely, 2^1045851681 is an apocalyptic number.

It is an amenable number.

1045851681 is a deficient number, since it is larger than the sum of its proper divisors (604910047).

1045851681 is a wasteful number, since it uses less digits than its factorization.

1045851681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5581.

The product of its (nonzero) digits is 38400, while the sum is 39.

The square root of 1045851681 is about 32339.6301926908. The cubic root of 1045851681 is about 1015.0560707375.

The spelling of 1045851681 in words is "one billion, forty-five million, eight hundred fifty-one thousand, six hundred eighty-one".