11985487 has 2 divisors, whose sum is σ = 11985488. Its totient is φ = 11985486.

The previous prime is 11985469. The next prime is 11985551. The reversal of 11985487 is 78458911.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11985487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11985427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5992743 + 5992744.

It is an arithmetic number, because the mean of its divisors is an integer number (5992744).

Almost surely, 2^11985487 is an apocalyptic number.

11985487 is a deficient number, since it is larger than the sum of its proper divisors (1).

11985487 is an equidigital number, since it uses as much as digits as its factorization.

11985487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 43.

The square root of 11985487 is about 3462.0062102775. The cubic root of 11985487 is about 228.8505155121.

Subtracting from 11985487 its sum of digits (43), we obtain a square (11985444 = 3462²).

The spelling of 11985487 in words is "eleven million, nine hundred eighty-five thousand, four hundred eighty-seven".