420211403 has 4 divisors (see below), whose sum is σ = 438481488. Its totient is φ = 401941320.

The previous prime is 420211397. The next prime is 420211427. The reversal of 420211403 is 304112024.

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

It is a cyclic number.

It is not a de Polignac number, because 420211403 - 2⁶ = 420211339 is a prime.

It is a super-2 number, since 2×420211403² = 353155246422456818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420211903) 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, 9135008 + ... + 9135053.

It is an arithmetic number, because the mean of its divisors is an integer number (109620372).

Almost surely, 2^420211403 is an apocalyptic number.

420211403 is a deficient number, since it is larger than the sum of its proper divisors (18270085).

420211403 is a wasteful number, since it uses less digits than its factorization.

420211403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18270084.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 420211403 is about 20499.0585881401. The cubic root of 420211403 is about 749.0128660662.

Adding to 420211403 its reverse (304112024), we get a palindrome (724323427).

The spelling of 420211403 in words is "four hundred twenty million, two hundred eleven thousand, four hundred three".