1304091 has 6 divisors (see below), whose sum is σ = 1883700. Its totient is φ = 869388.

The previous prime is 1304089. The next prime is 1304111. The reversal of 1304091 is 1904031.

It is not a de Polignac number, because 1304091 - 2¹ = 1304089 is a prime.

It is an Ulam number.

1304091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1304071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72441 + ... + 72458.

It is an arithmetic number, because the mean of its divisors is an integer number (313950).

2^1304091 is an apocalyptic number.

1304091 is a deficient number, since it is larger than the sum of its proper divisors (579609).

1304091 is a wasteful number, since it uses less digits than its factorization.

1304091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144905 (or 144902 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1304091 is about 1141.9680380816. The cubic root of 1304091 is about 109.2536527395.

It can be divided in two parts, 13040 and 91, that added together give a palindrome (13131).

The spelling of 1304091 in words is "one million, three hundred four thousand, ninety-one".