13209652 has 6 divisors (see below), whose sum is σ = 23116898. Its totient is φ = 6604824.

The previous prime is 13209649. The next prime is 13209661. The reversal of 13209652 is 25690231.

It can be written as a sum of positive squares in only one way, i.e., 10732176 + 2477476 = 3276^2 + 1574^2 .

It is a super-2 number, since 2×13209652² = 348989811922208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13209652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1651203 + ... + 1651210.

Almost surely, 2^13209652 is an apocalyptic number.

It is an amenable number.

13209652 is a deficient number, since it is larger than the sum of its proper divisors (9907246).

13209652 is a wasteful number, since it uses less digits than its factorization.

13209652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3302417 (or 3302415 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 13209652 is about 3634.5084949687. The cubic root of 13209652 is about 236.3907392805.

Adding to 13209652 its reverse (25690231), we get a palindrome (38899883).

It can be divided in two parts, 13209 and 652, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 13209652 in words is "thirteen million, two hundred nine thousand, six hundred fifty-two".