647045 has 24 divisors (see below), whose sum is σ = 957600. Its totient is φ = 417312.

The previous prime is 647039. The next prime is 647047. The reversal of 647045 is 540746.

It is not a de Polignac number, because 647045 - 2⁶ = 646981 is a prime.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4586 + ... + 4724.

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

2⁶⁴⁷⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

647045 is a deficient number, since it is larger than the sum of its proper divisors (310555).

647045 is a wasteful number, since it uses less digits than its factorization.

647045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 647045 is about 804.3910740430. The cubic root of 647045 is about 86.4924425665.

The spelling of 647045 in words is "six hundred forty-seven thousand, forty-five".