649442 has 8 divisors (see below), whose sum is σ = 980316. Its totient is φ = 322672.

The previous prime is 649427. The next prime is 649457. The reversal of 649442 is 244946.

649442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (649427) and next prime (649457).

It can be written as a sum of positive squares in 2 ways, for example, as 591361 + 58081 = 769^2 + 241^2 .

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

It is a super-2 number, since 2×649442² = 843549822728, which contains 22 as substring.

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593 + ... + 1284.

2⁶⁴⁹⁴⁴² is an apocalyptic number.

649442 is a deficient number, since it is larger than the sum of its proper divisors (330874).

649442 is a wasteful number, since it uses less digits than its factorization.

649442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052.

The product of its digits is 6912, while the sum is 29.

The square root of 649442 is about 805.8796436193. The cubic root of 649442 is about 86.5991156724.

Subtracting from 649442 its reverse (244946), we obtain a square (404496 = 636²).

It can be divided in two parts, 64944 and 2, that added together give a palindrome (64946).

The spelling of 649442 in words is "six hundred forty-nine thousand, four hundred forty-two".