1371091 has 4 divisors (see below), whose sum is σ = 1418400. Its totient is φ = 1323784.

The previous prime is 1371089. The next prime is 1371103. The reversal of 1371091 is 1901731.

1371091 = 80² + 81² + ... + 166².

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 1371091 - 2¹ = 1371089 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 (1371001) 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 3 ways as a sum of consecutive naturals, for example, 23611 + ... + 23668.

It is an arithmetic number, because the mean of its divisors is an integer number (354600).

2^1371091 is an apocalyptic number.

1371091 is a deficient number, since it is larger than the sum of its proper divisors (47309).

1371091 is an equidigital number, since it uses as much as digits as its factorization.

1371091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47308.

The product of its (nonzero) digits is 189, while the sum is 22.

The square root of 1371091 is about 1170.9359504260. The cubic root of 1371091 is about 111.0935282918.

The spelling of 1371091 in words is "one million, three hundred seventy-one thousand, ninety-one".