404865541 has 2 divisors, whose sum is σ = 404865542. Its totient is φ = 404865540.

The previous prime is 404865533. The next prime is 404865563. The reversal of 404865541 is 145568404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260144641 + 144720900 = 16129^2 + 12030^2 .

It is a cyclic number.

It is not a de Polignac number, because 404865541 - 2³ = 404865533 is a prime.

It is a super-2 number, since 2×404865541² = 327832212578445362, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 404865541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404865341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202432770 + 202432771.

It is an arithmetic number, because the mean of its divisors is an integer number (202432771).

Almost surely, 2^404865541 is an apocalyptic number.

It is an amenable number.

404865541 is a deficient number, since it is larger than the sum of its proper divisors (1).

404865541 is an equidigital number, since it uses as much as digits as its factorization.

404865541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76800, while the sum is 37.

The square root of 404865541 is about 20121.2708594661. The cubic root of 404865541 is about 739.7817356045.

The spelling of 404865541 in words is "four hundred four million, eight hundred sixty-five thousand, five hundred forty-one".