425629 has 4 divisors (see below), whose sum is σ = 450684. Its totient is φ = 400576.

The previous prime is 425609. The next prime is 425641. The reversal of 425629 is 926524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 273529 + 152100 = 523^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 425629 - 2⁷ = 425501 is a prime.

It is a Duffinian number.

425629 is a modest number, since divided by 629 gives 425 as remainder.

425629 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 425597 and 425606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12502 + ... + 12535.

It is an arithmetic number, because the mean of its divisors is an integer number (112671).

2⁴²⁵⁶²⁹ is an apocalyptic number.

It is an amenable number.

425629 is a deficient number, since it is larger than the sum of its proper divisors (25055).

425629 is a wasteful number, since it uses less digits than its factorization.

425629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25054.

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

The square root of 425629 is about 652.4024831345. The cubic root of 425629 is about 75.2218026604.

It can be divided in two parts, 42 and 5629, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 425629 in words is "four hundred twenty-five thousand, six hundred twenty-nine".