406866025 has 24 divisors (see below), whose sum is σ = 511511904. Its totient is φ = 321014400.

The previous prime is 406865989. The next prime is 406866029. The reversal of 406866025 is 520668604.

It is not a de Polignac number, because 406866025 - 2¹⁹ = 406341737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406866029) 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, 722394 + ... + 722956.

It is an arithmetic number, because the mean of its divisors is an integer number (21312996).

Almost surely, 2^406866025 is an apocalyptic number.

It is an amenable number.

406866025 is a deficient number, since it is larger than the sum of its proper divisors (104645879).

406866025 is a wasteful number, since it uses less digits than its factorization.

406866025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921 (or 916 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 406866025 is about 20170.9202814349. The cubic root of 406866025 is about 740.9981811989.

The spelling of 406866025 in words is "four hundred six million, eight hundred sixty-six thousand, twenty-five".