1421404220 has 24 divisors (see below), whose sum is σ = 2988862800. Its totient is φ = 567816192.

The previous prime is 1421404211. The next prime is 1421404241. The reversal of 1421404220 is 224041241.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1421404192 and 1421404201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30830 + ... + 61589.

It is an arithmetic number, because the mean of its divisors is an integer number (124535950).

Almost surely, 2^1421404220 is an apocalyptic number.

1421404220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421404220 is an abundant number, since it is smaller than the sum of its proper divisors (1567458580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421404220 is a wasteful number, since it uses less digits than its factorization.

1421404220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93197 (or 93195 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1421404220 is about 37701.5148236778. The cubic root of 1421404220 is about 1124.3612426597.

Adding to 1421404220 its reverse (224041241), we get a palindrome (1645445461).

The spelling of 1421404220 in words is "one billion, four hundred twenty-one million, four hundred four thousand, two hundred twenty".