1421366643 has 16 divisors (see below), whose sum is σ = 2121104160. Its totient is φ = 940658688.

The previous prime is 1421366633. The next prime is 1421366659. The reversal of 1421366643 is 3466631241.

It is not a de Polignac number, because 1421366643 - 2¹³ = 1421358451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1421366598 and 1421366607.

It is not an unprimeable number, because it can be changed into a prime (1421366603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188430 + ... + 195827.

It is an arithmetic number, because the mean of its divisors is an integer number (132569010).

Almost surely, 2^1421366643 is an apocalyptic number.

1421366643 is a deficient number, since it is larger than the sum of its proper divisors (699737517).

1421366643 is a wasteful number, since it uses less digits than its factorization.

1421366643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384403 (or 384397 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 1421366643 is about 37701.0164717080. The cubic root of 1421366643 is about 1124.3513345013.

Adding to 1421366643 its reverse (3466631241), we get a palindrome (4887997884).

The spelling of 1421366643 in words is "one billion, four hundred twenty-one million, three hundred sixty-six thousand, six hundred forty-three".