13402191 has 16 divisors (see below), whose sum is σ = 19911168. Its totient is φ = 7948800.

The previous prime is 13402189. The next prime is 13402223. The reversal of 13402191 is 19120431.

13402191 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13402191 - 2¹ = 13402189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13402141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2770 + ... + 5871.

It is an arithmetic number, because the mean of its divisors is an integer number (1244448).

Almost surely, 2^13402191 is an apocalyptic number.

13402191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13402191 is a deficient number, since it is larger than the sum of its proper divisors (6508977).

13402191 is a wasteful number, since it uses less digits than its factorization.

13402191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8702.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 13402191 is about 3660.9002991068. The cubic root of 13402191 is about 237.5337185737.

It can be divided in two parts, 13 and 402191, that added together give a palindrome (402204).

The spelling of 13402191 in words is "thirteen million, four hundred two thousand, one hundred ninety-one".