13252440 has 32 divisors (see below), whose sum is σ = 39757680. Its totient is φ = 3533952.

The previous prime is 13252429. The next prime is 13252441. The reversal of 13252440 is 4425231.

13252440 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13252441) 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, 55099 + ... + 55338.

Almost surely, 2^13252440 is an apocalyptic number.

13252440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13252440 is an abundant number, since it is smaller than the sum of its proper divisors (26505240).

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

13252440 is a wasteful number, since it uses less digits than its factorization.

13252440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110451 (or 110447 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 13252440 is about 3640.3900889877. The cubic root of 13252440 is about 236.6456989513.

Adding to 13252440 its reverse (4425231), we get a palindrome (17677671).

The spelling of 13252440 in words is "thirteen million, two hundred fifty-two thousand, four hundred forty".