649071 has 12 divisors (see below), whose sum is σ = 960960. Its totient is φ = 421920.

The previous prime is 649069. The next prime is 649073. The reversal of 649071 is 170946.

It is an interprime number because it is at equal distance from previous prime (649069) and next prime (649073).

It is not a de Polignac number, because 649071 - 2¹ = 649069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 511 + ... + 1248.

It is an arithmetic number, because the mean of its divisors is an integer number (80080).

2⁶⁴⁹⁰⁷¹ is an apocalyptic number.

649071 is a deficient number, since it is larger than the sum of its proper divisors (311889).

649071 is a wasteful number, since it uses less digits than its factorization.

649071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806 (or 1803 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 649071 is about 805.6494274807. The cubic root of 649071 is about 86.5826223383.

It can be divided in two parts, 6490 and 71, that added together give a 8-th power (6561 = 3⁸).

The spelling of 649071 in words is "six hundred forty-nine thousand, seventy-one".