647465 has 16 divisors (see below), whose sum is σ = 956928. Its totient is φ = 409536.

The previous prime is 647453. The next prime is 647477. The reversal of 647465 is 564746.

It is an interprime number because it is at equal distance from previous prime (647453) and next prime (647477).

It is a cyclic number.

It is not a de Polignac number, because 647465 - 2⁶ = 647401 is a prime.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647465.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257 + ... + 1166.

It is an arithmetic number, because the mean of its divisors is an integer number (59808).

2⁶⁴⁷⁴⁶⁵ is an apocalyptic number.

647465 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

647465 is a deficient number, since it is larger than the sum of its proper divisors (309463).

647465 is a wasteful number, since it uses less digits than its factorization.

647465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448.

The product of its digits is 20160, while the sum is 32.

The square root of 647465 is about 804.6520987358. The cubic root of 647465 is about 86.5111527380.

The spelling of 647465 in words is "six hundred forty-seven thousand, four hundred sixty-five".