420697 has 4 divisors (see below), whose sum is σ = 429696. Its totient is φ = 411700.

The previous prime is 420691. The next prime is 420731. The reversal of 420697 is 796024.

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 420697 - 2⁷ = 420569 is a prime.

It is a Duffinian number.

420697 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (420691) 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, 4429 + ... + 4522.

It is an arithmetic number, because the mean of its divisors is an integer number (107424).

2⁴²⁰⁶⁹⁷ is an apocalyptic number.

420697 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

420697 is a deficient number, since it is larger than the sum of its proper divisors (8999).

420697 is an equidigital number, since it uses as much as digits as its factorization.

420697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8998.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 420697 is about 648.6115940993. The cubic root of 420697 is about 74.9301275173.

The spelling of 420697 in words is "four hundred twenty thousand, six hundred ninety-seven".