406745 has 4 divisors (see below), whose sum is σ = 488100. Its totient is φ = 325392.

The previous prime is 406739. The next prime is 406789. The reversal of 406745 is 547604.

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 51529 + 355216 = 227^2 + 596^2 .

It is a cyclic number.

It is not a de Polignac number, because 406745 - 2⁴ = 406729 is a prime.

It is a nialpdrome in base 14.

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, 40670 + ... + 40679.

It is an arithmetic number, because the mean of its divisors is an integer number (122025).

2⁴⁰⁶⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

406745 is a deficient number, since it is larger than the sum of its proper divisors (81355).

406745 is an equidigital number, since it uses as much as digits as its factorization.

406745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81354.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 406745 is about 637.7656309335. The cubic root of 406745 is about 74.0924702304.

The spelling of 406745 in words is "four hundred six thousand, seven hundred forty-five".