13640252 has 24 divisors (see below), whose sum is σ = 25389840. Its totient is φ = 6393600.

The previous prime is 13640213. The next prime is 13640257. The reversal of 13640252 is 25204631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13640257) 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, 6788 + ... + 8564.

It is an arithmetic number, because the mean of its divisors is an integer number (1057910).

Almost surely, 2^13640252 is an apocalyptic number.

It is an amenable number.

13640252 is a deficient number, since it is larger than the sum of its proper divisors (11749588).

13640252 is a wasteful number, since it uses less digits than its factorization.

13640252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901 (or 1899 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 13640252 is about 3693.2711787791. The cubic root of 13640252 is about 238.9318970540.

Adding to 13640252 its reverse (25204631), we get a palindrome (38844883).

The spelling of 13640252 in words is "thirteen million, six hundred forty thousand, two hundred fifty-two".