645029 has 8 divisors (see below), whose sum is σ = 804288. Its totient is φ = 502560.

The previous prime is 645023. The next prime is 645037. The reversal of 645029 is 920546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 645029 - 2⁴ = 645013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 644989 and 645007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4112 + ... + 4265.

It is an arithmetic number, because the mean of its divisors is an integer number (100536).

2⁶⁴⁵⁰²⁹ is an apocalyptic number.

It is an amenable number.

645029 is a deficient number, since it is larger than the sum of its proper divisors (159259).

645029 is a wasteful number, since it uses less digits than its factorization.

645029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8395.

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

The square root of 645029 is about 803.1369746189. The cubic root of 645029 is about 86.4025208598.

The spelling of 645029 in words is "six hundred forty-five thousand, twenty-nine".