406529 has 4 divisors (see below), whose sum is σ = 408576. Its totient is φ = 404484.

The previous prime is 406517. The next prime is 406531. The reversal of 406529 is 925604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 406529 - 2⁴ = 406513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 406498 and 406507.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406529.

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 3 ways as a sum of consecutive naturals, for example, 689 + ... + 1134.

It is an arithmetic number, because the mean of its divisors is an integer number (102144).

It is a Proth number, since it is equal to 397 ⋅ 2¹⁰ + 1 and 397 < 2¹⁰.

2⁴⁰⁶⁵²⁹ is an apocalyptic number.

It is an amenable number.

406529 is a deficient number, since it is larger than the sum of its proper divisors (2047).

406529 is a wasteful number, since it uses less digits than its factorization.

406529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 406529 is about 637.5962672413. The cubic root of 406529 is about 74.0793524233.

The spelling of 406529 in words is "four hundred six thousand, five hundred twenty-nine".