1420232021 has 4 divisors (see below), whose sum is σ = 1529480652. Its totient is φ = 1310983392.

The previous prime is 1420232017. The next prime is 1420232029. The reversal of 1420232021 is 1202320241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1202320241 = 3761 ⋅319681.

It can be written as a sum of positive squares in 2 ways, for example, as 608608900 + 811623121 = 24670^2 + 28489^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420232021 - 2² = 1420232017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420232029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54624296 + ... + 54624321.

It is an arithmetic number, because the mean of its divisors is an integer number (382370163).

Almost surely, 2^1420232021 is an apocalyptic number.

It is an amenable number.

1420232021 is a deficient number, since it is larger than the sum of its proper divisors (109248631).

1420232021 is a wasteful number, since it uses less digits than its factorization.

1420232021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109248630.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1420232021 is about 37685.9658361040. The cubic root of 1420232021 is about 1124.0520794691.

Adding to 1420232021 its reverse (1202320241), we get a palindrome (2622552262).

The spelling of 1420232021 in words is "one billion, four hundred twenty million, two hundred thirty-two thousand, twenty-one".