6442251 has 8 divisors (see below), whose sum is σ = 8718144. Its totient is φ = 4230600.

The previous prime is 6442237. The next prime is 6442259. The reversal of 6442251 is 1522446.

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

It is not a de Polignac number, because 6442251 - 2⁷ = 6442123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6442259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15825 + ... + 16226.

It is an arithmetic number, because the mean of its divisors is an integer number (1089768).

Almost surely, 2^6442251 is an apocalyptic number.

6442251 is a deficient number, since it is larger than the sum of its proper divisors (2275893).

6442251 is a wasteful number, since it uses less digits than its factorization.

6442251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32121.

The product of its digits is 1920, while the sum is 24.

The square root of 6442251 is about 2538.1589784724. The cubic root of 6442251 is about 186.0712237350.

Adding to 6442251 its reverse (1522446), we get a palindrome (7964697).

The spelling of 6442251 in words is "six million, four hundred forty-two thousand, two hundred fifty-one".