11891241 has 6 divisors (see below), whose sum is σ = 17176250. Its totient is φ = 7927488.

The previous prime is 11891203. The next prime is 11891251. The reversal of 11891241 is 14219811.

11891241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10265616 + 1625625 = 3204^2 + 1275^2 .

It is not a de Polignac number, because 11891241 - 2¹⁷ = 11760169 is a prime.

It is a super-2 number, since 2×11891241² = 282803225040162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11891251) 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, 660616 + ... + 660633.

Almost surely, 2^11891241 is an apocalyptic number.

It is an amenable number.

11891241 is a deficient number, since it is larger than the sum of its proper divisors (5285009).

11891241 is a wasteful number, since it uses less digits than its factorization.

11891241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321255 (or 1321252 counting only the distinct ones).

The product of its digits is 576, while the sum is 27.

The square root of 11891241 is about 3448.3678748069. The cubic root of 11891241 is about 228.2490929529.

The spelling of 11891241 in words is "eleven million, eight hundred ninety-one thousand, two hundred forty-one".