45071281 has 2 divisors, whose sum is σ = 45071282. Its totient is φ = 45071280.

The previous prime is 45071239. The next prime is 45071309. The reversal of 45071281 is 18217054.

It is an a-pointer prime, because the next prime (45071309) can be obtained adding 45071281 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43678881 + 1392400 = 6609^2 + 1180^2 .

It is a cyclic number.

It is not a de Polignac number, because 45071281 - 2⁷ = 45071153 is a prime.

It is a super-2 number, since 2×45071281² = 4062840741961922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (45071231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22535640 + 22535641.

It is an arithmetic number, because the mean of its divisors is an integer number (22535641).

Almost surely, 2^45071281 is an apocalyptic number.

It is an amenable number.

45071281 is a deficient number, since it is larger than the sum of its proper divisors (1).

45071281 is an equidigital number, since it uses as much as digits as its factorization.

45071281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 45071281 is about 6713.5148022478. The cubic root of 45071281 is about 355.8770379741.

It can be divided in two parts, 4507128 and 1, that added together give a square (4507129 = 2123²).

The spelling of 45071281 in words is "forty-five million, seventy-one thousand, two hundred eighty-one".