7140839 has 4 divisors (see below), whose sum is σ = 7159224. Its totient is φ = 7122456.

The previous prime is 7140823. The next prime is 7140841. The reversal of 7140839 is 9380417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9380417 = 53 ⋅176989.

It is a cyclic number.

It is not a de Polignac number, because 7140839 - 2⁴ = 7140823 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7140899) 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, 8597 + ... + 9390.

It is an arithmetic number, because the mean of its divisors is an integer number (1789806).

Almost surely, 2^7140839 is an apocalyptic number.

7140839 is a deficient number, since it is larger than the sum of its proper divisors (18385).

7140839 is a wasteful number, since it uses less digits than its factorization.

7140839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18384.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 7140839 is about 2672.2348324951. The cubic root of 7140839 is about 192.5675391277.

The spelling of 7140839 in words is "seven million, one hundred forty thousand, eight hundred thirty-nine".