647235 has 24 divisors (see below), whose sum is σ = 1182480. Its totient is φ = 326592.

The previous prime is 647219. The next prime is 647261. The reversal of 647235 is 532746.

It is a happy number.

It is not a de Polignac number, because 647235 - 2⁴ = 647219 is a prime.

647235 is a lucky number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 647199 and 647208.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 477 + ... + 1233.

It is an arithmetic number, because the mean of its divisors is an integer number (49270).

2⁶⁴⁷²³⁵ is an apocalyptic number.

647235 is a deficient number, since it is larger than the sum of its proper divisors (535245).

647235 is a wasteful number, since it uses less digits than its factorization.

647235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787 (or 784 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 647235 is about 804.5091671324. The cubic root of 647235 is about 86.5009076943.

The spelling of 647235 in words is "six hundred forty-seven thousand, two hundred thirty-five".