6459646 has 4 divisors (see below), whose sum is σ = 9689472. Its totient is φ = 3229822.

The previous prime is 6459637. The next prime is 6459659. The reversal of 6459646 is 6469546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6469546 = 2 ⋅3234773.

It is a junction number, because it is equal to n+sod(n) for n = 6459599 and 6459608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1614910 + ... + 1614913.

It is an arithmetic number, because the mean of its divisors is an integer number (2422368).

Almost surely, 2^6459646 is an apocalyptic number.

6459646 is a deficient number, since it is larger than the sum of its proper divisors (3229826).

6459646 is a wasteful number, since it uses less digits than its factorization.

6459646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229825.

The product of its digits is 155520, while the sum is 40.

The square root of 6459646 is about 2541.5833647551. The cubic root of 6459646 is about 186.2385462079.

Adding to 6459646 its product of digits (155520), we get a palindrome (6615166).

The spelling of 6459646 in words is "six million, four hundred fifty-nine thousand, six hundred forty-six".