648245 has 8 divisors (see below), whose sum is σ = 837816. Its totient is φ = 478656.

The previous prime is 648239. The next prime is 648257. The reversal of 648245 is 542846.

648245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5041 + 643204 = 71^2 + 802^2 .

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 648245 - 2⁴ = 648229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4922 + ... + 5051.

It is an arithmetic number, because the mean of its divisors is an integer number (104727).

2⁶⁴⁸²⁴⁵ is an apocalyptic number.

648245 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

648245 is a deficient number, since it is larger than the sum of its proper divisors (189571).

648245 is a wasteful number, since it uses less digits than its factorization.

648245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9991.

The product of its digits is 7680, while the sum is 29.

The square root of 648245 is about 805.1366343671. The cubic root of 648245 is about 86.5458787438.

The spelling of 648245 in words is "six hundred forty-eight thousand, two hundred forty-five".