420007403 has 8 divisors (see below), whose sum is σ = 430753680. Its totient is φ = 409285120.

The previous prime is 420007397. The next prime is 420007433. The reversal of 420007403 is 304700024.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420007403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420007433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32576 + ... + 43602.

It is an arithmetic number, because the mean of its divisors is an integer number (53844210).

Almost surely, 2^420007403 is an apocalyptic number.

420007403 is a deficient number, since it is larger than the sum of its proper divisors (10746277).

420007403 is a wasteful number, since it uses less digits than its factorization.

420007403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11997.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 420007403 is about 20494.0821458293. The cubic root of 420007403 is about 748.8916387057.

Adding to 420007403 its reverse (304700024), we get a palindrome (724707427).

The spelling of 420007403 in words is "four hundred twenty million, seven thousand, four hundred three".