1420115421 has 4 divisors (see below), whose sum is σ = 1893487232. Its totient is φ = 946743612.

The previous prime is 1420115407. The next prime is 1420115453. The reversal of 1420115421 is 1245110241.

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 not a de Polignac number, because 1420115421 - 2⁶ = 1420115357 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 (1420115491) 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, 236685901 + ... + 236685906.

It is an arithmetic number, because the mean of its divisors is an integer number (473371808).

Almost surely, 2^1420115421 is an apocalyptic number.

It is an amenable number.

1420115421 is a deficient number, since it is larger than the sum of its proper divisors (473371811).

1420115421 is an equidigital number, since it uses as much as digits as its factorization.

1420115421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473371810.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1420115421 is about 37684.4188093700. The cubic root of 1420115421 is about 1124.0213173454.

Adding to 1420115421 its reverse (1245110241), we get a palindrome (2665225662).

The spelling of 1420115421 in words is "one billion, four hundred twenty million, one hundred fifteen thousand, four hundred twenty-one".