11487531 has 16 divisors (see below), whose sum is σ = 16846848. Its totient is φ = 6904800.

The previous prime is 11487491. The next prime is 11487569. The reversal of 11487531 is 13578411.

It is not a de Polignac number, because 11487531 - 2⁷ = 11487403 is a prime.

It is a super-2 number, since 2×11487531² = 263926736951922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11487331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2821 + ... + 5561.

It is an arithmetic number, because the mean of its divisors is an integer number (1052928).

Almost surely, 2^11487531 is an apocalyptic number.

11487531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11487531 is a deficient number, since it is larger than the sum of its proper divisors (5359317).

11487531 is a wasteful number, since it uses less digits than its factorization.

11487531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2882.

The product of its digits is 3360, while the sum is 30.

The square root of 11487531 is about 3389.3260392001. The cubic root of 11487531 is about 225.6362632530.

The spelling of 11487531 in words is "eleven million, four hundred eighty-seven thousand, five hundred thirty-one".