7144391 has 4 divisors (see below), whose sum is σ = 7230552. Its totient is φ = 7058232.

The previous prime is 7144387. The next prime is 7144409. The reversal of 7144391 is 1934417.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7144391 - 2² = 7144387 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 (7144331) 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, 42956 + ... + 43121.

It is an arithmetic number, because the mean of its divisors is an integer number (1807638).

Almost surely, 2^7144391 is an apocalyptic number.

7144391 is a deficient number, since it is larger than the sum of its proper divisors (86161).

7144391 is an equidigital number, since it uses as much as digits as its factorization.

7144391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86160.

The product of its digits is 3024, while the sum is 29.

The square root of 7144391 is about 2672.8993621160. The cubic root of 7144391 is about 192.5994628517.

The spelling of 7144391 in words is "seven million, one hundred forty-four thousand, three hundred ninety-one".