420115421 has 4 divisors (see below), whose sum is σ = 458307744. Its totient is φ = 381923100.

The previous prime is 420115417. The next prime is 420115433. The reversal of 420115421 is 124511024.

It is a happy number.

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 420115421 - 2² = 420115417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420115393 and 420115402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420115121) 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, 19096145 + ... + 19096166.

It is an arithmetic number, because the mean of its divisors is an integer number (114576936).

Almost surely, 2^420115421 is an apocalyptic number.

It is an amenable number.

420115421 is a deficient number, since it is larger than the sum of its proper divisors (38192323).

420115421 is a wasteful number, since it uses less digits than its factorization.

420115421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38192322.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 420115421 is about 20496.7173225373. The cubic root of 420115421 is about 748.9558334815.

Adding to 420115421 its reverse (124511024), we get a palindrome (544626445).

The spelling of 420115421 in words is "four hundred twenty million, one hundred fifteen thousand, four hundred twenty-one".