1597091 has 2 divisors, whose sum is σ = 1597092. Its totient is φ = 1597090.

The previous prime is 1597081. The next prime is 1597103. The reversal of 1597091 is 1907951.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1597091 - 2¹⁴ = 1580707 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1597081) 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, 798545 + 798546.

It is an arithmetic number, because the mean of its divisors is an integer number (798546).

2^1597091 is an apocalyptic number.

1597091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1597091 is an equidigital number, since it uses as much as digits as its factorization.

1597091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835, while the sum is 32.

The square root of 1597091 is about 1263.7606577196. The cubic root of 1597091 is about 116.8897834636.

It can be divided in two parts, 15970 and 91, that added together give a palindrome (16061).

The spelling of 1597091 in words is "one million, five hundred ninety-seven thousand, ninety-one".