1421023420 has 24 divisors (see below), whose sum is σ = 2989090944. Its totient is φ = 567468096.

The previous prime is 1421023397. The next prime is 1421023423. The reversal of 1421023420 is 243201241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421023423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46387 + ... + 70666.

It is an arithmetic number, because the mean of its divisors is an integer number (124545456).

Almost surely, 2^1421023420 is an apocalyptic number.

1421023420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421023420 is an abundant number, since it is smaller than the sum of its proper divisors (1568067524).

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

1421023420 is a wasteful number, since it uses less digits than its factorization.

1421023420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117669 (or 117667 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1421023420 is about 37696.4642904345. The cubic root of 1421023420 is about 1124.2608267012.

Adding to 1421023420 its reverse (243201241), we get a palindrome (1664224661).

The spelling of 1421023420 in words is "one billion, four hundred twenty-one million, twenty-three thousand, four hundred twenty".