420493 has 4 divisors (see below), whose sum is σ = 427680. Its totient is φ = 413308.

The previous prime is 420481. The next prime is 420499. The reversal of 420493 is 394024.

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 a de Polignac number, because none of the positive numbers 2^k-420493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420499) 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, 3505 + ... + 3622.

It is an arithmetic number, because the mean of its divisors is an integer number (106920).

2⁴²⁰⁴⁹³ is an apocalyptic number.

It is an amenable number.

420493 is a deficient number, since it is larger than the sum of its proper divisors (7187).

420493 is an equidigital number, since it uses as much as digits as its factorization.

420493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7186.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 420493 is about 648.4543160470. The cubic root of 420493 is about 74.9180141139.

The spelling of 420493 in words is "four hundred twenty thousand, four hundred ninety-three".