406551 has 8 divisors (see below), whose sum is σ = 560880. Its totient is φ = 261632.

The previous prime is 406547. The next prime is 406559. The reversal of 406551 is 155604.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 406551 - 2² = 406547 is a prime.

406551 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2250 + ... + 2423.

It is an arithmetic number, because the mean of its divisors is an integer number (70110).

2⁴⁰⁶⁵⁵¹ is an apocalyptic number.

406551 is a deficient number, since it is larger than the sum of its proper divisors (154329).

406551 is a wasteful number, since it uses less digits than its factorization.

406551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4705.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 406551 is about 637.6135193046. The cubic root of 406551 is about 74.0806887087.

The spelling of 406551 in words is "four hundred six thousand, five hundred fifty-one".