1487191 has 2 divisors, whose sum is σ = 1487192. Its totient is φ = 1487190.

The previous prime is 1487179. The next prime is 1487197. The reversal of 1487191 is 1917841.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1487191 - 2⁵ = 1487159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1487197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 743595 + 743596.

It is an arithmetic number, because the mean of its divisors is an integer number (743596).

2^1487191 is an apocalyptic number.

1487191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1487191 is an equidigital number, since it uses as much as digits as its factorization.

1487191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 31.

The square root of 1487191 is about 1219.5044075361. The cubic root of 1487191 is about 114.1446558049.

The spelling of 1487191 in words is "one million, four hundred eighty-seven thousand, one hundred ninety-one".