1421851247 has 2 divisors, whose sum is σ = 1421851248. Its totient is φ = 1421851246.

The previous prime is 1421851241. The next prime is 1421851261. The reversal of 1421851247 is 7421581241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1421851247 - 2¹⁰ = 1421850223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421851241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710925623 + 710925624.

It is an arithmetic number, because the mean of its divisors is an integer number (710925624).

Almost surely, 2^1421851247 is an apocalyptic number.

1421851247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421851247 is an equidigital number, since it uses as much as digits as its factorization.

1421851247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17920, while the sum is 35.

The square root of 1421851247 is about 37707.4428594674. The cubic root of 1421851247 is about 1124.4790996223.

The spelling of 1421851247 in words is "one billion, four hundred twenty-one million, eight hundred fifty-one thousand, two hundred forty-seven".