1421253271 has 2 divisors, whose sum is σ = 1421253272. Its totient is φ = 1421253270.

The previous prime is 1421253269. The next prime is 1421253277. The reversal of 1421253271 is 1723521241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1421253271 - 2¹ = 1421253269 is a prime.

Together with 1421253269, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421253277) by changing a digit.

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 as a sum of consecutive naturals, namely, 710626635 + 710626636.

It is an arithmetic number, because the mean of its divisors is an integer number (710626636).

Almost surely, 2^1421253271 is an apocalyptic number.

1421253271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421253271 is an equidigital number, since it uses as much as digits as its factorization.

1421253271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 28.

The square root of 1421253271 is about 37699.5128748370. The cubic root of 1421253271 is about 1124.3214399512.

The spelling of 1421253271 in words is "one billion, four hundred twenty-one million, two hundred fifty-three thousand, two hundred seventy-one".