649041 has 4 divisors (see below), whose sum is σ = 865392. Its totient is φ = 432692.

The previous prime is 649039. The next prime is 649063. The reversal of 649041 is 140946.

649041 is nontrivially palindromic in base 5.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 649041 - 2¹ = 649039 is a prime.

It is an Ulam number.

It is a D-number.

649041 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (649001) 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, 108171 + ... + 108176.

It is an arithmetic number, because the mean of its divisors is an integer number (216348).

2⁶⁴⁹⁰⁴¹ is an apocalyptic number.

It is an amenable number.

649041 is a deficient number, since it is larger than the sum of its proper divisors (216351).

649041 is a wasteful number, since it uses less digits than its factorization.

649041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216350.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 649041 is about 805.6308087455. The cubic root of 649041 is about 86.5812883709.

Adding to 649041 its reverse (140946), we get a palindrome (789987).

The spelling of 649041 in words is "six hundred forty-nine thousand, forty-one".