1425421187 has 2 divisors, whose sum is σ = 1425421188. Its totient is φ = 1425421186.

The previous prime is 1425421171. The next prime is 1425421201. The reversal of 1425421187 is 7811245241.

It is a strong prime.

It is an emirp because it is prime and its reverse (7811245241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1425421187 - 2⁴ = 1425421171 is a prime.

It is not a weakly prime, because it can be changed into another prime (1425421157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 712710593 + 712710594.

It is an arithmetic number, because the mean of its divisors is an integer number (712710594).

Almost surely, 2^1425421187 is an apocalyptic number.

1425421187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1425421187 is an equidigital number, since it uses as much as digits as its factorization.

1425421187 is an evil number, because the sum of its binary digits is even.

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

The square root of 1425421187 is about 37754.7505222853. The cubic root of 1425421187 is about 1125.4194155015.

The spelling of 1425421187 in words is "one billion, four hundred twenty-five million, four hundred twenty-one thousand, one hundred eighty-seven".