406401255 has 48 divisors (see below), whose sum is σ = 761525856. Its totient is φ = 199307520.

The previous prime is 406401253. The next prime is 406401257. The reversal of 406401255 is 552104604.

406401255 is a `hidden beast` number, since 4 + 0 + 6 + 401 + 255 = 666.

It is an interprime number because it is at equal distance from previous prime (406401253) and next prime (406401257).

It is not a de Polignac number, because 406401255 - 2¹ = 406401253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406401253) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 170220 + ... + 172590.

It is an arithmetic number, because the mean of its divisors is an integer number (15865122).

Almost surely, 2^406401255 is an apocalyptic number.

406401255 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

406401255 is a deficient number, since it is larger than the sum of its proper divisors (355124601).

406401255 is a wasteful number, since it uses less digits than its factorization.

With its successor (406401256) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (2685).

With its successor (406401256) it forms an eRAP, since the sums of their prime factors are consecutive (2688 and 2689).

406401255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2688 (or 2685 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 406401255 is about 20159.3961963150. The cubic root of 406401255 is about 740.7159220748.

Adding to 406401255 its reverse (552104604), we get a palindrome (958505859).

The spelling of 406401255 in words is "four hundred six million, four hundred one thousand, two hundred fifty-five".