421629 has 16 divisors (see below), whose sum is σ = 638400. Its totient is φ = 245376.

The previous prime is 421621. The next prime is 421633. The reversal of 421629 is 926124.

It is not a de Polignac number, because 421629 - 2³ = 421621 is a prime.

421629 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 421599 and 421608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 457 + ... + 1025.

It is an arithmetic number, because the mean of its divisors is an integer number (39900).

2⁴²¹⁶²⁹ is an apocalyptic number.

It is an amenable number.

421629 is a deficient number, since it is larger than the sum of its proper divisors (216771).

421629 is a wasteful number, since it uses less digits than its factorization.

421629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604.

The product of its digits is 864, while the sum is 24.

The square root of 421629 is about 649.3296543359. The cubic root of 421629 is about 74.9854193878.

The spelling of 421629 in words is "four hundred twenty-one thousand, six hundred twenty-nine".