11487281 has 16 divisors (see below), whose sum is σ = 13069056. Its totient is φ = 10017216.

The previous prime is 11487269. The next prime is 11487293. The reversal of 11487281 is 18278411.

It is an interprime number because it is at equal distance from previous prime (11487269) and next prime (11487293).

It is a cyclic number.

It is not a de Polignac number, because 11487281 - 2¹⁰ = 11486257 is a prime.

It is a super-2 number, since 2×11487281² = 263915249545922, which contains 22 as substring.

Its product of digits (3584) is a multiple of the sum of its prime divisors (512).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11487211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30611 + ... + 30983.

It is an arithmetic number, because the mean of its divisors is an integer number (816816).

Almost surely, 2^11487281 is an apocalyptic number.

It is an amenable number.

11487281 is a deficient number, since it is larger than the sum of its proper divisors (1581775).

11487281 is a wasteful number, since it uses less digits than its factorization.

11487281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512.

The product of its digits is 3584, while the sum is 32.

The square root of 11487281 is about 3389.2891585110. The cubic root of 11487281 is about 225.6346264210.

The spelling of 11487281 in words is "eleven million, four hundred eighty-seven thousand, two hundred eighty-one".