405629 has 4 divisors (see below), whose sum is σ = 463584. Its totient is φ = 347676.

The previous prime is 405611. The next prime is 405641. The reversal of 405629 is 926504.

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 not a de Polignac number, because 405629 - 2⁸ = 405373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 405598 and 405607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405659) 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, 28967 + ... + 28980.

It is an arithmetic number, because the mean of its divisors is an integer number (115896).

2⁴⁰⁵⁶²⁹ is an apocalyptic number.

It is an amenable number.

405629 is a deficient number, since it is larger than the sum of its proper divisors (57955).

405629 is an equidigital number, since it uses as much as digits as its factorization.

405629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57954.

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

The square root of 405629 is about 636.8901004098. The cubic root of 405629 is about 74.0246448228.

The spelling of 405629 in words is "four hundred five thousand, six hundred twenty-nine".