11487861 has 48 divisors (see below), whose sum is σ = 21011328. Its totient is φ = 5924160.

The previous prime is 11487859. The next prime is 11487863. The reversal of 11487861 is 16878411.

11487861 = 29² + 30² + ... + 325².

It is an interprime number because it is at equal distance from previous prime (11487859) and next prime (11487863).

It is not a de Polignac number, because 11487861 - 2¹ = 11487859 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11487863) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83785 + ... + 83921.

It is an arithmetic number, because the mean of its divisors is an integer number (437736).

Almost surely, 2^11487861 is an apocalyptic number.

11487861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11487861 is a deficient number, since it is larger than the sum of its proper divisors (9523467).

11487861 is a wasteful number, since it uses less digits than its factorization.

11487861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 158 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 11487861 is about 3389.3747210953. The cubic root of 11487861 is about 225.6384238348.

It can be divided in two parts, 1148 and 7861, that added together give a palindrome (9009).

The spelling of 11487861 in words is "eleven million, four hundred eighty-seven thousand, eight hundred sixty-one".