13240642 has 8 divisors (see below), whose sum is σ = 19889100. Its totient is φ = 6610944.

The previous prime is 13240621. The next prime is 13240651. The reversal of 13240642 is 24604231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12752041 + 488601 = 3571^2 + 699^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2767 + ... + 5842.

Almost surely, 2^13240642 is an apocalyptic number.

13240642 is a deficient number, since it is larger than the sum of its proper divisors (6648458).

13240642 is an equidigital number, since it uses as much as digits as its factorization.

13240642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9380.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 13240642 is about 3638.7692974411. The cubic root of 13240642 is about 236.5754533996.

Adding to 13240642 its reverse (24604231), we get a palindrome (37844873).

The spelling of 13240642 in words is "thirteen million, two hundred forty thousand, six hundred forty-two".