648471 has 4 divisors (see below), whose sum is σ = 864632. Its totient is φ = 432312.

The previous prime is 648449. The next prime is 648481. The reversal of 648471 is 174846.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 648471 - 2⁷ = 648343 is a prime.

It is a super-3 number, since 3×648471³ = 818074643146173333, which contains 333 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108076 + ... + 108081.

It is an arithmetic number, because the mean of its divisors is an integer number (216158).

2⁶⁴⁸⁴⁷¹ is an apocalyptic number.

648471 is a deficient number, since it is larger than the sum of its proper divisors (216161).

648471 is a wasteful number, since it uses less digits than its factorization.

648471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216160.

The product of its digits is 5376, while the sum is 30.

The square root of 648471 is about 805.2769709858. The cubic root of 648471 is about 86.5559351762. Note that the first 3 decimals are identical.

It can be divided in two parts, 6484 and 71, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 648471 in words is "six hundred forty-eight thousand, four hundred seventy-one".