13243402 has 12 divisors (see below), whose sum is σ = 20138706. Its totient is φ = 6531720.

The previous prime is 13243393. The next prime is 13243409. The reversal of 13243402 is 20434231.

It can be written as a sum of positive squares in only one way, i.e., 10491121 + 2752281 = 3239^2 + 1659^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13243402.

It is not an unprimeable number, because it can be changed into a prime (13243409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11952 + ... + 13012.

Almost surely, 2^13243402 is an apocalyptic number.

13243402 is a deficient number, since it is larger than the sum of its proper divisors (6895304).

13243402 is an equidigital number, since it uses as much as digits as its factorization.

13243402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221 (or 1142 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 13243402 is about 3639.1485267848. The cubic root of 13243402 is about 236.5918902383.

Adding to 13243402 its reverse (20434231), we get a palindrome (33677633).

It can be divided in two parts, 132 and 43402, that added together give a palindrome (43534).

The spelling of 13243402 in words is "thirteen million, two hundred forty-three thousand, four hundred two".