649401 has 8 divisors (see below), whose sum is σ = 911520. Its totient is φ = 410112.

The previous prime is 649381. The next prime is 649403. The reversal of 649401 is 104946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 649401 - 2⁷ = 649273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649403) 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 7 ways as a sum of consecutive naturals, for example, 5640 + ... + 5753.

It is an arithmetic number, because the mean of its divisors is an integer number (113940).

2⁶⁴⁹⁴⁰¹ is an apocalyptic number.

It is an amenable number.

649401 is a deficient number, since it is larger than the sum of its proper divisors (262119).

649401 is a wasteful number, since it uses less digits than its factorization.

649401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11415.

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

The square root of 649401 is about 805.8542051761. The cubic root of 649401 is about 86.5972932677.

The spelling of 649401 in words is "six hundred forty-nine thousand, four hundred one".