1420434221 has 4 divisors (see below), whose sum is σ = 1430802492. Its totient is φ = 1410065952.

The previous prime is 1420434203. The next prime is 1420434241. The reversal of 1420434221 is 1224340241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1224340241 = 29 ⋅42218629.

It can be written as a sum of positive squares in 2 ways, for example, as 1213477225 + 206956996 = 34835^2 + 14386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420434221 - 2¹⁴ = 1420417837 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 (1420434241) 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, 5183930 + ... + 5184203.

It is an arithmetic number, because the mean of its divisors is an integer number (357700623).

Almost surely, 2^1420434221 is an apocalyptic number.

It is an amenable number.

1420434221 is a deficient number, since it is larger than the sum of its proper divisors (10368271).

1420434221 is a wasteful number, since it uses less digits than its factorization.

1420434221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10368270.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1420434221 is about 37688.6484368968. The cubic root of 1420434221 is about 1124.1054211160.

Adding to 1420434221 its reverse (1224340241), we get a palindrome (2644774462).

The spelling of 1420434221 in words is "one billion, four hundred twenty million, four hundred thirty-four thousand, two hundred twenty-one".