620129 has 4 divisors (see below), whose sum is σ = 623280. Its totient is φ = 616980.

The previous prime is 620117. The next prime is 620159. The reversal of 620129 is 921026.

620129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-620129 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 620129.

It is not an unprimeable number, because it can be changed into a prime (620159) 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, 1259 + ... + 1680.

It is an arithmetic number, because the mean of its divisors is an integer number (155820).

2⁶²⁰¹²⁹ is an apocalyptic number.

It is an amenable number.

620129 is a deficient number, since it is larger than the sum of its proper divisors (3151).

620129 is a wasteful number, since it uses less digits than its factorization.

620129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3150.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 620129 is about 787.4826982226. The cubic root of 620129 is about 85.2761033230.

The spelling of 620129 in words is "six hundred twenty thousand, one hundred twenty-nine".