406431247 has 4 divisors (see below), whose sum is σ = 406471960. Its totient is φ = 406390536.

The previous prime is 406431241. The next prime is 406431253. The reversal of 406431247 is 742134604.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (406431241) and next prime (406431253).

It is a cyclic number.

It is not a de Polignac number, because 406431247 - 2¹⁵ = 406398479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406431241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5953 + ... + 29125.

It is an arithmetic number, because the mean of its divisors is an integer number (101617990).

Almost surely, 2^406431247 is an apocalyptic number.

406431247 is a deficient number, since it is larger than the sum of its proper divisors (40713).

406431247 is a wasteful number, since it uses less digits than its factorization.

406431247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40712.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 406431247 is about 20160.1400540770. The cubic root of 406431247 is about 740.7341429876.

The spelling of 406431247 in words is "four hundred six million, four hundred thirty-one thousand, two hundred forty-seven".