1421345191 has 16 divisors (see below), whose sum is σ = 1698098688. Its totient is φ = 1163210400.

The previous prime is 1421345161. The next prime is 1421345213. The reversal of 1421345191 is 1915431241.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421345191 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 (1421345131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84201 + ... + 99661.

It is an arithmetic number, because the mean of its divisors is an integer number (106131168).

Almost surely, 2^1421345191 is an apocalyptic number.

1421345191 is a deficient number, since it is larger than the sum of its proper divisors (276753497).

1421345191 is a wasteful number, since it uses less digits than its factorization.

1421345191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16062.

The product of its digits is 4320, while the sum is 31.

The square root of 1421345191 is about 37700.7319690215. The cubic root of 1421345191 is about 1124.3456780423.

The spelling of 1421345191 in words is "one billion, four hundred twenty-one million, three hundred forty-five thousand, one hundred ninety-one".