1421420428 has 12 divisors (see below), whose sum is σ = 2498445432. Its totient is φ = 707578880.

The previous prime is 1421420417. The next prime is 1421420491. The reversal of 1421420428 is 8240241241.

It is a junction number, because it is equal to n+sod(n) for n = 1421420396 and 1421420405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 781813 + ... + 783628.

It is an arithmetic number, because the mean of its divisors is an integer number (208203786).

Almost surely, 2^1421420428 is an apocalyptic number.

It is an amenable number.

1421420428 is a deficient number, since it is larger than the sum of its proper divisors (1077025004).

1421420428 is a wasteful number, since it uses less digits than its factorization.

1421420428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565672 (or 1565670 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 1421420428 is about 37701.7297746403. The cubic root of 1421420428 is about 1124.3655162688.

Adding to 1421420428 its reverse (8240241241), we get a palindrome (9661661669).

The spelling of 1421420428 in words is "one billion, four hundred twenty-one million, four hundred twenty thousand, four hundred twenty-eight".