7021606 has 4 divisors (see below), whose sum is σ = 10532412. Its totient is φ = 3510802.

The previous prime is 7021589. The next prime is 7021607. The reversal of 7021606 is 6061207.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6061207 = 113 ⋅53639.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7021607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1755400 + ... + 1755403.

It is an arithmetic number, because the mean of its divisors is an integer number (2633103).

Almost surely, 2^7021606 is an apocalyptic number.

7021606 is a deficient number, since it is larger than the sum of its proper divisors (3510806).

7021606 is a wasteful number, since it uses less digits than its factorization.

7021606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510805.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 7021606 is about 2649.8313153859. The cubic root of 7021606 is about 191.4897294221.

The spelling of 7021606 in words is "seven million, twenty-one thousand, six hundred six".