649127 has 4 divisors (see below), whose sum is σ = 655656. Its totient is φ = 642600.

The previous prime is 649123. The next prime is 649141. The reversal of 649127 is 721946.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 721946 = 2 ⋅360973.

It is a cyclic number.

It is not a de Polignac number, because 649127 - 2² = 649123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 649127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649123) by changing a digit.

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, 3113 + ... + 3314.

It is an arithmetic number, because the mean of its divisors is an integer number (163914).

2⁶⁴⁹¹²⁷ is an apocalyptic number.

649127 is a deficient number, since it is larger than the sum of its proper divisors (6529).

649127 is a wasteful number, since it uses less digits than its factorization.

649127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6528.

The product of its digits is 3024, while the sum is 29.

The square root of 649127 is about 805.6841813018. The cubic root of 649127 is about 86.5851123008.

The spelling of 649127 in words is "six hundred forty-nine thousand, one hundred twenty-seven".