648155 has 4 divisors (see below), whose sum is σ = 777792. Its totient is φ = 518520.

The previous prime is 648133. The next prime is 648173. The reversal of 648155 is 551846.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551846 = 2 ⋅275923.

It is not a de Polignac number, because 648155 - 2¹⁰ = 647131 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64811 + ... + 64820.

It is an arithmetic number, because the mean of its divisors is an integer number (194448).

2⁶⁴⁸¹⁵⁵ is an apocalyptic number.

648155 is a deficient number, since it is larger than the sum of its proper divisors (129637).

648155 is a wasteful number, since it uses less digits than its factorization.

648155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129636.

The product of its digits is 4800, while the sum is 29.

The square root of 648155 is about 805.0807412924. The cubic root of 648155 is about 86.5418733191.

The spelling of 648155 in words is "six hundred forty-eight thousand, one hundred fifty-five".