648615 has 16 divisors (see below), whose sum is σ = 1132416. Its totient is φ = 314400.

The previous prime is 648607. The next prime is 648617. The reversal of 648615 is 516846.

It is not a de Polignac number, because 648615 - 2³ = 648607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1801 + ... + 2130.

It is an arithmetic number, because the mean of its divisors is an integer number (70776).

2⁶⁴⁸⁶¹⁵ is an apocalyptic number.

648615 is a deficient number, since it is larger than the sum of its proper divisors (483801).

648615 is a wasteful number, since it uses less digits than its factorization.

648615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3950.

The product of its digits is 5760, while the sum is 30.

The square root of 648615 is about 805.3663762537. The cubic root of 648615 is about 86.5623415959.

Subtracting from 648615 its reverse (516846), we obtain a square (131769 = 363²).

The spelling of 648615 in words is "six hundred forty-eight thousand, six hundred fifteen".