6422749 has 4 divisors (see below), whose sum is σ = 6427836. Its totient is φ = 6417664.

The previous prime is 6422729. The next prime is 6422761. The reversal of 6422749 is 9472246.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4334724 + 2088025 = 2082^2 + 1445^2 .

It is a cyclic number.

It is not a de Polignac number, because 6422749 - 2¹³ = 6414557 is a prime.

It is a Duffinian number.

6422749 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6422729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 957 + ... + 3709.

It is an arithmetic number, because the mean of its divisors is an integer number (1606959).

Almost surely, 2^6422749 is an apocalyptic number.

It is an amenable number.

6422749 is a deficient number, since it is larger than the sum of its proper divisors (5087).

6422749 is a wasteful number, since it uses less digits than its factorization.

6422749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086.

The product of its digits is 24192, while the sum is 34.

The square root of 6422749 is about 2534.3143056851. The cubic root of 6422749 is about 185.8832755141.

The spelling of 6422749 in words is "six million, four hundred twenty-two thousand, seven hundred forty-nine".