1420221535 has 8 divisors (see below), whose sum is σ = 1705160016. Its totient is φ = 1135581120.

The previous prime is 1420221533. The next prime is 1420221559. The reversal of 1420221535 is 5351220241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1420221535 - 2¹ = 1420221533 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 (1420221533) 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, 63894 + ... + 83203.

It is an arithmetic number, because the mean of its divisors is an integer number (213145002).

Almost surely, 2^1420221535 is an apocalyptic number.

1420221535 is a deficient number, since it is larger than the sum of its proper divisors (284938481).

1420221535 is a wasteful number, since it uses less digits than its factorization.

1420221535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149033.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1420221535 is about 37685.8267124393. The cubic root of 1420221535 is about 1124.0493130575.

Adding to 1420221535 its reverse (5351220241), we get a palindrome (6771441776).

The spelling of 1420221535 in words is "one billion, four hundred twenty million, two hundred twenty-one thousand, five hundred thirty-five".