649275 has 24 divisors (see below), whose sum is σ = 1172544. Its totient is φ = 314400.

The previous prime is 649273. The next prime is 649277. The reversal of 649275 is 572946.

It is an interprime number because it is at equal distance from previous prime (649273) and next prime (649277).

It is not a de Polignac number, because 649275 - 2¹ = 649273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a d-powerful number, because it can be written as 6² + 4⁶ + 2¹⁹ + 9² + 7⁶ + 5⁵ .

It is not an unprimeable number, because it can be changed into a prime (649273) 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 23 ways as a sum of consecutive naturals, for example, 432 + ... + 1218.

It is an arithmetic number, because the mean of its divisors is an integer number (48856).

2⁶⁴⁹²⁷⁵ is an apocalyptic number.

649275 is a deficient number, since it is larger than the sum of its proper divisors (523269).

649275 is a wasteful number, since it uses less digits than its factorization.

649275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811 (or 806 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 649275 is about 805.7760234705. The cubic root of 649275 is about 86.5916922268.

Adding to 649275 its reverse (572946), we get a palindrome (1222221).

It can be divided in two parts, 64 and 9275, that added together give a palindrome (9339).

The spelling of 649275 in words is "six hundred forty-nine thousand, two hundred seventy-five".