45012581 has 2 divisors, whose sum is σ = 45012582. Its totient is φ = 45012580.

The previous prime is 45012523. The next prime is 45012599. The reversal of 45012581 is 18521054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29528356 + 15484225 = 5434^2 + 3935^2 .

It is a cyclic number.

It is not a de Polignac number, because 45012581 - 2²² = 40818277 is a prime.

It is a super-2 number, since 2×45012581² = 4052264896563122, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 45012581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45012281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22506290 + 22506291.

It is an arithmetic number, because the mean of its divisors is an integer number (22506291).

Almost surely, 2^45012581 is an apocalyptic number.

It is an amenable number.

45012581 is a deficient number, since it is larger than the sum of its proper divisors (1).

45012581 is an equidigital number, since it uses as much as digits as its factorization.

45012581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 45012581 is about 6709.1415993404. The cubic root of 45012581 is about 355.7224749712.

It can be divided in two parts, 450 and 12581, that added together give a palindrome (13031).

The spelling of 45012581 in words is "forty-five million, twelve thousand, five hundred eighty-one".