11291871 has 16 divisors (see below), whose sum is σ = 15920000. Its totient is φ = 7099488.

The previous prime is 11291869. The next prime is 11291881. The reversal of 11291871 is 17819211.

It is not a de Polignac number, because 11291871 - 2¹ = 11291869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11291801) 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, 22380 + ... + 22878.

It is an arithmetic number, because the mean of its divisors is an integer number (995000).

Almost surely, 2^11291871 is an apocalyptic number.

11291871 is a deficient number, since it is larger than the sum of its proper divisors (4628129).

11291871 is a wasteful number, since it uses less digits than its factorization.

11291871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918.

The product of its digits is 1008, while the sum is 30.

The square root of 11291871 is about 3360.3379294351. The cubic root of 11291871 is about 224.3478796787.

The spelling of 11291871 in words is "eleven million, two hundred ninety-one thousand, eight hundred seventy-one".