11291145 has 16 divisors (see below), whose sum is σ = 19128960. Its totient is φ = 5667584.

The previous prime is 11291143. The next prime is 11291167. The reversal of 11291145 is 54119211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11291145 - 2¹ = 11291143 is a prime.

It is a super-2 number, since 2×11291145² = 254979910822050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11291143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21885 + ... + 22394.

It is an arithmetic number, because the mean of its divisors is an integer number (1195560).

Almost surely, 2^11291145 is an apocalyptic number.

11291145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11291145 is a deficient number, since it is larger than the sum of its proper divisors (7837815).

11291145 is a wasteful number, since it uses less digits than its factorization.

11291145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44304.

The product of its digits is 360, while the sum is 24.

The square root of 11291145 is about 3360.2299028489. The cubic root of 11291145 is about 224.3430714985.

The spelling of 11291145 in words is "eleven million, two hundred ninety-one thousand, one hundred forty-five".