405725841 has 20 divisors (see below), whose sum is σ = 606639792. Its totient is φ = 270236088.

The previous prime is 405725839. The next prime is 405725843. The reversal of 405725841 is 148527504.

405725841 is a `hidden beast` number, since 4 + 0 + 5 + 72 + 584 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (405725839) and next prime (405725843).

It is not a de Polignac number, because 405725841 - 2¹ = 405725839 is a prime.

It is a super-2 number, since 2×405725841² = 329226916110314562, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 405725796 and 405725805.

It is not an unprimeable number, because it can be changed into a prime (405725843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 143346 + ... + 146148.

Almost surely, 2^405725841 is an apocalyptic number.

It is an amenable number.

405725841 is a deficient number, since it is larger than the sum of its proper divisors (200913951).

405725841 is a wasteful number, since it uses less digits than its factorization.

405725841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4602 (or 4593 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The square root of 405725841 is about 20142.6373893788. The cubic root of 405725841 is about 740.3053530422.

The spelling of 405725841 in words is "four hundred five million, seven hundred twenty-five thousand, eight hundred forty-one".