1421043187 has 2 divisors, whose sum is σ = 1421043188. Its totient is φ = 1421043186.

The previous prime is 1421043179. The next prime is 1421043191. The reversal of 1421043187 is 7813401241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1421043187 - 2³ = 1421043179 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421041187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710521593 + 710521594.

It is an arithmetic number, because the mean of its divisors is an integer number (710521594).

Almost surely, 2^1421043187 is an apocalyptic number.

1421043187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421043187 is an equidigital number, since it uses as much as digits as its factorization.

1421043187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 1421043187 is about 37696.7264759157. The cubic root of 1421043187 is about 1124.2660396485.

The spelling of 1421043187 in words is "one billion, four hundred twenty-one million, forty-three thousand, one hundred eighty-seven".