1420431553 has 4 divisors (see below), whose sum is σ = 1427569600. Its totient is φ = 1413293508.

The previous prime is 1420431541. The next prime is 1420431569. The reversal of 1420431553 is 3551340241.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3551340241 = 18493 ⋅192037.

It is a cyclic number.

It is not a de Polignac number, because 1420431553 - 2⁵ = 1420431521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420431503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3568725 + ... + 3569122.

It is an arithmetic number, because the mean of its divisors is an integer number (356892400).

Almost surely, 2^1420431553 is an apocalyptic number.

It is an amenable number.

1420431553 is a deficient number, since it is larger than the sum of its proper divisors (7138047).

1420431553 is an equidigital number, since it uses as much as digits as its factorization.

1420431553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7138046.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1420431553 is about 37688.6130416071. The cubic root of 1420431553 is about 1124.1047173136.

Adding to 1420431553 its reverse (3551340241), we get a palindrome (4971771794).

The spelling of 1420431553 in words is "one billion, four hundred twenty million, four hundred thirty-one thousand, five hundred fifty-three".