7144639 has 8 divisors (see below), whose sum is σ = 7285248. Its totient is φ = 7005600.

The previous prime is 7144637. The next prime is 7144691. The reversal of 7144639 is 9364417.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 7144639 - 2¹ = 7144637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7144637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12549 + ... + 13105.

It is an arithmetic number, because the mean of its divisors is an integer number (910656).

Almost surely, 2^7144639 is an apocalyptic number.

7144639 is a deficient number, since it is larger than the sum of its proper divisors (140609).

7144639 is a wasteful number, since it uses less digits than its factorization.

7144639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785.

The product of its digits is 18144, while the sum is 34.

The square root of 7144639 is about 2672.9457532842. The cubic root of 7144639 is about 192.6016913651.

The spelling of 7144639 in words is "seven million, one hundred forty-four thousand, six hundred thirty-nine".