11291641 has 4 divisors (see below), whose sum is σ = 11318884. Its totient is φ = 11264400.

The previous prime is 11291639. The next prime is 11291647. The reversal of 11291641 is 14619211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14619211 = 223 ⋅65557.

It can be written as a sum of positive squares in 2 ways, for example, as 3980025 + 7311616 = 1995^2 + 2704^2 .

It is a cyclic number.

It is not a de Polignac number, because 11291641 - 2¹ = 11291639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11291647) 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, 12990 + ... + 13831.

It is an arithmetic number, because the mean of its divisors is an integer number (2829721).

Almost surely, 2^11291641 is an apocalyptic number.

It is an amenable number.

11291641 is a deficient number, since it is larger than the sum of its proper divisors (27243).

11291641 is an equidigital number, since it uses as much as digits as its factorization.

11291641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27242.

The product of its digits is 432, while the sum is 25.

The square root of 11291641 is about 3360.3037065123. The cubic root of 11291641 is about 224.3463564483.

The spelling of 11291641 in words is "eleven million, two hundred ninety-one thousand, six hundred forty-one".