406487 has 4 divisors (see below), whose sum is σ = 430416. Its totient is φ = 382560.

The previous prime is 406481. The next prime is 406499. The reversal of 406487 is 784604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 406487 - 2⁶ = 406423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406487.

It is not an unprimeable number, because it can be changed into a prime (406481) 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, 11939 + ... + 11972.

It is an arithmetic number, because the mean of its divisors is an integer number (107604).

2⁴⁰⁶⁴⁸⁷ is an apocalyptic number.

406487 is a deficient number, since it is larger than the sum of its proper divisors (23929).

406487 is a wasteful number, since it uses less digits than its factorization.

406487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23928.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 406487 is about 637.5633301877. The cubic root of 406487 is about 74.0768011990.

The spelling of 406487 in words is "four hundred six thousand, four hundred eighty-seven".