406205025 has 24 divisors (see below), whose sum is σ = 672561120. Its totient is φ = 216330240.

The previous prime is 406205017. The next prime is 406205027. The reversal of 406205025 is 520502604.

It is not a de Polignac number, because 406205025 - 2³ = 406205017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 406204986 and 406205004.

It is not an unprimeable number, because it can be changed into a prime (406205027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54154 + ... + 61196.

It is an arithmetic number, because the mean of its divisors is an integer number (28023380).

Almost surely, 2^406205025 is an apocalyptic number.

It is an amenable number.

406205025 is a deficient number, since it is larger than the sum of its proper divisors (266356095).

406205025 is a wasteful number, since it uses less digits than its factorization.

406205025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7825 (or 7820 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 406205025 is about 20154.5286474281. The cubic root of 406205025 is about 740.5966851679.

Adding to 406205025 its reverse (520502604), we get a palindrome (926707629).

The spelling of 406205025 in words is "four hundred six million, two hundred five thousand, twenty-five".