7021705 has 8 divisors (see below), whose sum is σ = 8585352. Its totient is φ = 5511168.

The previous prime is 7021691. The next prime is 7021711. The reversal of 7021705 is 5071207.

It can be written as a sum of positive squares in 4 ways, for example, as 2782224 + 4239481 = 1668^2 + 2059^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7021705 - 2⁷ = 7021577 is a prime.

It is a super-2 number, since 2×7021705² = 98608682214050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12984 + ... + 13513.

It is an arithmetic number, because the mean of its divisors is an integer number (1073169).

Almost surely, 2^7021705 is an apocalyptic number.

It is an amenable number.

7021705 is a deficient number, since it is larger than the sum of its proper divisors (1563647).

7021705 is a wasteful number, since it uses less digits than its factorization.

7021705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26555.

The product of its (nonzero) digits is 490, while the sum is 22.

The square root of 7021705 is about 2649.8499957545. The cubic root of 7021705 is about 191.4906293774.

The spelling of 7021705 in words is "seven million, twenty-one thousand, seven hundred five".