13121346 has 16 divisors (see below), whose sum is σ = 29991744. Its totient is φ = 3748944.

The previous prime is 13121341. The next prime is 13121371. The reversal of 13121346 is 64312131.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13121341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156165 + ... + 156248.

It is an arithmetic number, because the mean of its divisors is an integer number (1874484).

Almost surely, 2^13121346 is an apocalyptic number.

13121346 is an abundant number, since it is smaller than the sum of its proper divisors (16870398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13121346 is a wasteful number, since it uses less digits than its factorization.

13121346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312425.

The product of its digits is 432, while the sum is 21.

The square root of 13121346 is about 3622.3398515324. The cubic root of 13121346 is about 235.8628068840.

Adding to 13121346 its reverse (64312131), we get a palindrome (77433477).

The spelling of 13121346 in words is "thirteen million, one hundred twenty-one thousand, three hundred forty-six".