7020391 has 4 divisors (see below), whose sum is σ = 8023312. Its totient is φ = 6017472.

The previous prime is 7020379. The next prime is 7020397. The reversal of 7020391 is 1930207.

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 7020391 - 2¹¹ = 7018343 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 (7020397) 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, 501450 + ... + 501463.

It is an arithmetic number, because the mean of its divisors is an integer number (2005828).

Almost surely, 2^7020391 is an apocalyptic number.

7020391 is a deficient number, since it is larger than the sum of its proper divisors (1002921).

7020391 is a wasteful number, since it uses less digits than its factorization.

7020391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002920.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 7020391 is about 2649.6020455910. The cubic root of 7020391 is about 191.4786838274.

Adding to 7020391 its reverse (1930207), we get a palindrome (8950598).

The spelling of 7020391 in words is "seven million, twenty thousand, three hundred ninety-one".