1420134021 has 6 divisors (see below), whose sum is σ = 2051304710. Its totient is φ = 946756008.

The previous prime is 1420134017. The next prime is 1420134059. The reversal of 1420134021 is 1204310241.

It can be written as a sum of positive squares in only one way, i.e., 1218777921 + 201356100 = 34911^2 + 14190^2 .

It is not a de Polignac number, because 1420134021 - 2² = 1420134017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1420133985 and 1420134003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420134061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78896326 + ... + 78896343.

Almost surely, 2^1420134021 is an apocalyptic number.

It is an amenable number.

1420134021 is a deficient number, since it is larger than the sum of its proper divisors (631170689).

1420134021 is a wasteful number, since it uses less digits than its factorization.

1420134021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157792675 (or 157792672 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1420134021 is about 37684.6655949074. The cubic root of 1420134021 is about 1124.0262246238.

Adding to 1420134021 its reverse (1204310241), we get a palindrome (2624444262).

The spelling of 1420134021 in words is "one billion, four hundred twenty million, one hundred thirty-four thousand, twenty-one".