40045441 has 2 divisors, whose sum is σ = 40045442. Its totient is φ = 40045440.

The previous prime is 40045409. The next prime is 40045487. The reversal of 40045441 is 14454004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39942400 + 103041 = 6320^2 + 321^2 .

It is a cyclic number.

It is not a de Polignac number, because 40045441 - 2⁵ = 40045409 is a prime.

It is not a weakly prime, because it can be changed into another prime (40045241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20022720 + 20022721.

It is an arithmetic number, because the mean of its divisors is an integer number (20022721).

Almost surely, 2^40045441 is an apocalyptic number.

It is an amenable number.

40045441 is a deficient number, since it is larger than the sum of its proper divisors (1).

40045441 is an equidigital number, since it uses as much as digits as its factorization.

40045441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 40045441 is about 6328.1467271232. The cubic root of 40045441 is about 342.1246453543.

Adding to 40045441 its reverse (14454004), we get a palindrome (54499445).

The spelling of 40045441 in words is "forty million, forty-five thousand, four hundred forty-one".