7021379 has 4 divisors (see below), whose sum is σ = 7211184. Its totient is φ = 6831576.

The previous prime is 7021367. The next prime is 7021381. The reversal of 7021379 is 9731207.

It is a happy number.

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 7021379 - 2⁴ = 7021363 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7021309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94847 + ... + 94920.

It is an arithmetic number, because the mean of its divisors is an integer number (1802796).

Almost surely, 2^7021379 is an apocalyptic number.

7021379 is a deficient number, since it is larger than the sum of its proper divisors (189805).

7021379 is a wasteful number, since it uses less digits than its factorization.

7021379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189804.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 7021379 is about 2649.7884821246. The cubic root of 7021379 is about 191.4876658564.

The spelling of 7021379 in words is "seven million, twenty-one thousand, three hundred seventy-nine".