406465 has 4 divisors (see below), whose sum is σ = 487764. Its totient is φ = 325168.

The previous prime is 406447. The next prime is 406481. The reversal of 406465 is 564604.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 101761 + 304704 = 319^2 + 552^2 .

It is a cyclic number.

It is not a de Polignac number, because 406465 - 2¹³ = 398273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40642 + ... + 40651.

It is an arithmetic number, because the mean of its divisors is an integer number (121941).

2⁴⁰⁶⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

406465 is a deficient number, since it is larger than the sum of its proper divisors (81299).

406465 is an equidigital number, since it uses as much as digits as its factorization.

406465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81298.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 406465 is about 637.5460767662. The cubic root of 406465 is about 74.0754647733.

The spelling of 406465 in words is "four hundred six thousand, four hundred sixty-five".