1421322243 has 8 divisors (see below), whose sum is σ = 2067377856. Its totient is φ = 861407400.

The previous prime is 1421322239. The next prime is 1421322251. The reversal of 1421322243 is 3422231241.

It is a happy number.

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

It is not a de Polignac number, because 1421322243 - 2² = 1421322239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1421322223) 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, 21535153 + ... + 21535218.

It is an arithmetic number, because the mean of its divisors is an integer number (258422232).

Almost surely, 2^1421322243 is an apocalyptic number.

1421322243 is a deficient number, since it is larger than the sum of its proper divisors (646055613).

1421322243 is a wasteful number, since it uses less digits than its factorization.

1421322243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43070385.

The product of its digits is 2304, while the sum is 24.

The square root of 1421322243 is about 37700.4276235695. The cubic root of 1421322243 is about 1124.3396270554.

Adding to 1421322243 its reverse (3422231241), we get a palindrome (4843553484).

The spelling of 1421322243 in words is "one billion, four hundred twenty-one million, three hundred twenty-two thousand, two hundred forty-three".