694021 has 4 divisors (see below), whose sum is σ = 695872. Its totient is φ = 692172.

The previous prime is 694019. The next prime is 694033. The reversal of 694021 is 120496.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 694021 - 2¹ = 694019 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 693983 and 694001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (694061) 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, 141 + ... + 1186.

It is an arithmetic number, because the mean of its divisors is an integer number (173968).

2⁶⁹⁴⁰²¹ is an apocalyptic number.

It is an amenable number.

694021 is a deficient number, since it is larger than the sum of its proper divisors (1851).

694021 is a wasteful number, since it uses less digits than its factorization.

694021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 694021 is about 833.0792279249. The cubic root of 694021 is about 88.5368780309.

The spelling of 694021 in words is "six hundred ninety-four thousand, twenty-one".