40025281 has 2 divisors, whose sum is σ = 40025282. Its totient is φ = 40025280.

The previous prime is 40025263. The next prime is 40025299. The reversal of 40025281 is 18252004.

It is a balanced prime because it is at equal distance from previous prime (40025263) and next prime (40025299).

It can be written as a sum of positive squares in only one way, i.e., 37015056 + 3010225 = 6084^2 + 1735^2 .

It is a cyclic number.

It is not a de Polignac number, because 40025281 - 2²³ = 31636673 is a prime.

It is a super-2 number, since 2×40025281² = 3204046238257922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40025201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20012640 + 20012641.

It is an arithmetic number, because the mean of its divisors is an integer number (20012641).

Almost surely, 2^40025281 is an apocalyptic number.

It is an amenable number.

40025281 is a deficient number, since it is larger than the sum of its proper divisors (1).

40025281 is an equidigital number, since it uses as much as digits as its factorization.

40025281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 40025281 is about 6326.5536431773. The cubic root of 40025281 is about 342.0672239981.

Adding to 40025281 its reverse (18252004), we get a palindrome (58277285).

It can be divided in two parts, 400 and 25281, that multiplied together give a square (10112400 = 3180²).

The spelling of 40025281 in words is "forty million, twenty-five thousand, two hundred eighty-one".