697421 has 4 divisors (see below), whose sum is σ = 721500. Its totient is φ = 673344.

The previous prime is 697409. The next prime is 697423. The reversal of 697421 is 124796.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 354025 + 343396 = 595^2 + 586^2 .

It is a cyclic number.

It is not a de Polignac number, because 697421 - 2¹⁸ = 435277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 24049 = 697421 / (6 + 9 + 7 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 697421.

It is not an unprimeable number, because it can be changed into a prime (697423) 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, 11996 + ... + 12053.

It is an arithmetic number, because the mean of its divisors is an integer number (180375).

2⁶⁹⁷⁴²¹ is an apocalyptic number.

It is an amenable number.

697421 is a deficient number, since it is larger than the sum of its proper divisors (24079).

697421 is a wasteful number, since it uses less digits than its factorization.

697421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24078.

The product of its digits is 3024, while the sum is 29.

The square root of 697421 is about 835.1173570224. The cubic root of 697421 is about 88.6812229166.

The spelling of 697421 in words is "six hundred ninety-seven thousand, four hundred twenty-one".