13240742 has 4 divisors (see below), whose sum is σ = 19861116. Its totient is φ = 6620370.

The previous prime is 13240729. The next prime is 13240757. The reversal of 13240742 is 24704231.

It is a semiprime because it is the product of two primes.

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, 3310184 + ... + 3310187.

It is an arithmetic number, because the mean of its divisors is an integer number (4965279).

Almost surely, 2^13240742 is an apocalyptic number.

13240742 is a deficient number, since it is larger than the sum of its proper divisors (6620374).

13240742 is an equidigital number, since it uses as much as digits as its factorization.

13240742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6620373.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 13240742 is about 3638.7830383248. The cubic root of 13240742 is about 236.5760489771.

Adding to 13240742 its reverse (24704231), we get a palindrome (37944973).

The spelling of 13240742 in words is "thirteen million, two hundred forty thousand, seven hundred forty-two".