13121252 has 6 divisors (see below), whose sum is σ = 22962198. Its totient is φ = 6560624.

The previous prime is 13121243. The next prime is 13121257. The reversal of 13121252 is 25212131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13075456 + 45796 = 3616^2 + 214^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13121252.

It is not an unprimeable number, because it can be changed into a prime (13121257) 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 as a sum of consecutive naturals, namely, 1640153 + ... + 1640160.

It is an arithmetic number, because the mean of its divisors is an integer number (3827033).

Almost surely, 2^13121252 is an apocalyptic number.

It is an amenable number.

13121252 is a deficient number, since it is larger than the sum of its proper divisors (9840946).

13121252 is a wasteful number, since it uses less digits than its factorization.

13121252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3280317 (or 3280315 counting only the distinct ones).

The product of its digits is 120, while the sum is 17.

The square root of 13121252 is about 3622.3268764704. The cubic root of 13121252 is about 235.8622436502.

Adding to 13121252 its reverse (25212131), we get a palindrome (38333383).

The spelling of 13121252 in words is "thirteen million, one hundred twenty-one thousand, two hundred fifty-two".