1291375 has 8 divisors (see below), whose sum is σ = 1611792. Its totient is φ = 1033000.

The previous prime is 1291369. The next prime is 1291379. The reversal of 1291375 is 5731921.

It is not a de Polignac number, because 1291375 - 2⁵ = 1291343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5041 + ... + 5290.

It is an arithmetic number, because the mean of its divisors is an integer number (201474).

2^1291375 is an apocalyptic number.

1291375 is a deficient number, since it is larger than the sum of its proper divisors (320417).

1291375 is an equidigital number, since it uses as much as digits as its factorization.

1291375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10346 (or 10336 counting only the distinct ones).

The product of its digits is 1890, while the sum is 28.

The square root of 1291375 is about 1136.3868179454. The cubic root of 1291375 is about 108.8973868065.

The spelling of 1291375 in words is "one million, two hundred ninety-one thousand, three hundred seventy-five".