7139247 has 8 divisors (see below), whose sum is σ = 9740544. Its totient is φ = 4648728.

The previous prime is 7139219. The next prime is 7139273. The reversal of 7139247 is 7429317.

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

It is not a de Polignac number, because 7139247 - 2²⁰ = 6090671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7139287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27543 + ... + 27800.

It is an arithmetic number, because the mean of its divisors is an integer number (1217568).

Almost surely, 2^7139247 is an apocalyptic number.

7139247 is a deficient number, since it is larger than the sum of its proper divisors (2601297).

7139247 is a wasteful number, since it uses less digits than its factorization.

7139247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55389.

The product of its digits is 10584, while the sum is 33.

The square root of 7139247 is about 2671.9369378786. The cubic root of 7139247 is about 192.5532275365.

The spelling of 7139247 in words is "seven million, one hundred thirty-nine thousand, two hundred forty-seven".