1087291 has 2 divisors, whose sum is σ = 1087292. Its totient is φ = 1087290.

The previous prime is 1087271. The next prime is 1087301. The reversal of 1087291 is 1927801.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1087291 - 2⁵ = 1087259 is a prime.

It is a Chen prime.

1087291 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1087231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543645 + 543646.

It is an arithmetic number, because the mean of its divisors is an integer number (543646).

2^1087291 is an apocalyptic number.

1087291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1087291 is an equidigital number, since it uses as much as digits as its factorization.

1087291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1087291 is about 1042.7324680857. The cubic root of 1087291 is about 102.8289176118.

It can be divided in two parts, 1087 and 291, that added together give a triangular number (1378 = T₅₂).

The spelling of 1087291 in words is "one million, eighty-seven thousand, two hundred ninety-one".