406945 has 24 divisors (see below), whose sum is σ = 623808. Its totient is φ = 252000.

The previous prime is 406907. The next prime is 406951. The reversal of 406945 is 549604.

It is not a de Polignac number, because 406945 - 2⁷ = 406817 is a prime.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2620 + ... + 2770.

It is an arithmetic number, because the mean of its divisors is an integer number (25992).

2⁴⁰⁶⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

406945 is a deficient number, since it is larger than the sum of its proper divisors (216863).

406945 is a wasteful number, since it uses less digits than its factorization.

406945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 406945 is about 637.9224090750. The cubic root of 406945 is about 74.1046122079.

It can be divided in two parts, 4069 and 45, that added together give a palindrome (4114).

The spelling of 406945 in words is "four hundred six thousand, nine hundred forty-five".