1420130021 has 4 divisors (see below), whose sum is σ = 1420520544. Its totient is φ = 1419739500.

The previous prime is 1420130017. The next prime is 1420130027. The reversal of 1420130021 is 1200310241.

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 1420130021 - 2² = 1420130017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1420129978 and 1420130005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420130027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189755 + ... + 197096.

It is an arithmetic number, because the mean of its divisors is an integer number (355130136).

Almost surely, 2^1420130021 is an apocalyptic number.

It is an amenable number.

1420130021 is a deficient number, since it is larger than the sum of its proper divisors (390523).

1420130021 is an equidigital number, since it uses as much as digits as its factorization.

1420130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390522.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1420130021 is about 37684.6125228853. The cubic root of 1420130021 is about 1124.0251692987.

Adding to 1420130021 its reverse (1200310241), we get a palindrome (2620440262).

The spelling of 1420130021 in words is "one billion, four hundred twenty million, one hundred thirty thousand, twenty-one".