1421688355 has 4 divisors (see below), whose sum is σ = 1706026032. Its totient is φ = 1137350680.

The previous prime is 1421688341. The next prime is 1421688379. The reversal of 1421688355 is 5538861241.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1421688355 - 2⁷ = 1421688227 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142168831 + ... + 142168840.

It is an arithmetic number, because the mean of its divisors is an integer number (426506508).

Almost surely, 2^1421688355 is an apocalyptic number.

1421688355 is a deficient number, since it is larger than the sum of its proper divisors (284337677).

1421688355 is an equidigital number, since it uses as much as digits as its factorization.

1421688355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284337676.

The product of its digits is 230400, while the sum is 43.

The square root of 1421688355 is about 37705.2828526720. The cubic root of 1421688355 is about 1124.4361566292.

The spelling of 1421688355 in words is "one billion, four hundred twenty-one million, six hundred eighty-eight thousand, three hundred fifty-five".