405455121 has 12 divisors (see below), whose sum is σ = 586492660. Its totient is φ = 269917920.

The previous prime is 405455093. The next prime is 405455131. The reversal of 405455121 is 121554504.

405455121 is a `hidden beast` number, since 40 + 54 + 551 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 189365121 + 216090000 = 13761^2 + 14700^2 .

It is not a de Polignac number, because 405455121 - 2¹¹ = 405453073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405455131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25390 + ... + 38151.

Almost surely, 2^405455121 is an apocalyptic number.

It is an amenable number.

405455121 is a deficient number, since it is larger than the sum of its proper divisors (181037539).

405455121 is a wasteful number, since it uses less digits than its factorization.

405455121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64256 (or 64253 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 405455121 is about 20135.9161947005. The cubic root of 405455121 is about 740.1406605026.

The spelling of 405455121 in words is "four hundred five million, four hundred fifty-five thousand, one hundred twenty-one".