13421187 has 16 divisors (see below), whose sum is σ = 21413280. Its totient is φ = 8258976.

The previous prime is 13421173. The next prime is 13421207. The reversal of 13421187 is 78112431.

It is not a de Polignac number, because 13421187 - 2¹⁸ = 13159043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 13421187.

It is not an unprimeable number, because it can be changed into a prime (13421887) 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, 18768 + ... + 19469.

It is an arithmetic number, because the mean of its divisors is an integer number (1338330).

Almost surely, 2^13421187 is an apocalyptic number.

13421187 is a deficient number, since it is larger than the sum of its proper divisors (7992093).

13421187 is a wasteful number, since it uses less digits than its factorization.

13421187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38259 (or 38253 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 13421187 is about 3663.4938242066. The cubic root of 13421187 is about 237.6458907890.

It can be divided in two parts, 134 and 21187, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 13421187 in words is "thirteen million, four hundred twenty-one thousand, one hundred eighty-seven".