1427191 has 2 divisors, whose sum is σ = 1427192. Its totient is φ = 1427190.

The previous prime is 1427143. The next prime is 1427221. The reversal of 1427191 is 1917241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1427191 - 2¹⁵ = 1394423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1427141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713595 + 713596.

It is an arithmetic number, because the mean of its divisors is an integer number (713596).

2^1427191 is an apocalyptic number.

1427191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1427191 is an equidigital number, since it uses as much as digits as its factorization.

1427191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 25.

The square root of 1427191 is about 1194.6509950609. The cubic root of 1427191 is about 112.5884999092.

The spelling of 1427191 in words is "one million, four hundred twenty-seven thousand, one hundred ninety-one".