1275091 has 4 divisors (see below), whose sum is σ = 1292632. Its totient is φ = 1257552.

The previous prime is 1275067. The next prime is 1275107. The reversal of 1275091 is 1905721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1275091 - 2¹³ = 1266899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1275011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8661 + ... + 8806.

It is an arithmetic number, because the mean of its divisors is an integer number (323158).

2^1275091 is an apocalyptic number.

1275091 is a deficient number, since it is larger than the sum of its proper divisors (17541).

1275091 is an equidigital number, since it uses as much as digits as its factorization.

1275091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17540.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 1275091 is about 1129.1992738219. The cubic root of 1275091 is about 108.4377239654.

Adding to 1275091 its product of nonzero digits (630), we get a palindrome (1275721).

The spelling of 1275091 in words is "one million, two hundred seventy-five thousand, ninety-one".