649546 has 4 divisors (see below), whose sum is σ = 974322. Its totient is φ = 324772.

The previous prime is 649541. The next prime is 649559. The reversal of 649546 is 645946.

649546 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 648025 + 1521 = 805^2 + 39^2 .

It is a super-2 number, since 2×649546² = 843820012232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (649541) by changing a digit.

649546 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162385 + ... + 162388.

2⁶⁴⁹⁵⁴⁶ is an apocalyptic number.

649546 is a deficient number, since it is larger than the sum of its proper divisors (324776).

649546 is a wasteful number, since it uses less digits than its factorization.

649546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324775.

The product of its digits is 25920, while the sum is 34.

The square root of 649546 is about 805.9441668007. The cubic root of 649546 is about 86.6037380135.

Subtracting from 649546 its reverse (645946), we obtain a square (3600 = 60²).

The spelling of 649546 in words is "six hundred forty-nine thousand, five hundred forty-six".