420913 has 4 divisors (see below), whose sum is σ = 422500. Its totient is φ = 419328.

The previous prime is 420899. The next prime is 420919. The reversal of 420913 is 319024.

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 142129 + 278784 = 377^2 + 528^2 .

It is a cyclic number.

It is not a de Polignac number, because 420913 - 2¹⁷ = 289841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420919) 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, 288 + ... + 961.

It is an arithmetic number, because the mean of its divisors is an integer number (105625).

2⁴²⁰⁹¹³ is an apocalyptic number.

It is an amenable number.

420913 is a deficient number, since it is larger than the sum of its proper divisors (1587).

420913 is a wasteful number, since it uses less digits than its factorization.

420913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 420913 is about 648.7780822438. The cubic root of 420913 is about 74.9429492064.

Adding to 420913 its reverse (319024), we get a palindrome (739937).

The spelling of 420913 in words is "four hundred twenty thousand, nine hundred thirteen".