1151091 has 14 divisors (see below), whose sum is σ = 1726940. Its totient is φ = 766908.

The previous prime is 1151089. The next prime is 1151113. The reversal of 1151091 is 1901511.

It is not a de Polignac number, because 1151091 - 2¹ = 1151089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151021) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 61 + ... + 1518.

2^1151091 is an apocalyptic number.

1151091 is a deficient number, since it is larger than the sum of its proper divisors (575849).

1151091 is an frugal number, since it uses more digits than its factorization.

1151091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597 (or 1582 counting only the distinct ones).

The product of its (nonzero) digits is 45, while the sum is 18.

The square root of 1151091 is about 1072.8890902605. The cubic root of 1151091 is about 104.8020761296.

The spelling of 1151091 in words is "one million, one hundred fifty-one thousand, ninety-one".