1591351 has 2 divisors, whose sum is σ = 1591352. Its totient is φ = 1591350.

The previous prime is 1591339. The next prime is 1591363. The reversal of 1591351 is 1531951.

It is a balanced prime because it is at equal distance from previous prime (1591339) and next prime (1591363).

It is a cyclic number.

It is not a de Polignac number, because 1591351 - 2¹¹ = 1589303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1591391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 795675 + 795676.

It is an arithmetic number, because the mean of its divisors is an integer number (795676).

2^1591351 is an apocalyptic number.

1591351 is a deficient number, since it is larger than the sum of its proper divisors (1).

1591351 is an equidigital number, since it uses as much as digits as its factorization.

1591351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 675, while the sum is 25.

The square root of 1591351 is about 1261.4876138908. The cubic root of 1591351 is about 116.7495800629.

The spelling of 1591351 in words is "one million, five hundred ninety-one thousand, three hundred fifty-one".