13042738 has 4 divisors (see below), whose sum is σ = 19564110. Its totient is φ = 6521368.

The previous prime is 13042727. The next prime is 13042751. The reversal of 13042738 is 83724031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83724031 = 17 ⋅4924943.

It can be written as a sum of positive squares in only one way, i.e., 12938409 + 104329 = 3597^2 + 323^2 .

It is a super-2 number, since 2×13042738² = 340226029073288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260683 + ... + 3260686.

Almost surely, 2^13042738 is an apocalyptic number.

13042738 is a deficient number, since it is larger than the sum of its proper divisors (6521372).

13042738 is an equidigital number, since it uses as much as digits as its factorization.

13042738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6521371.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 13042738 is about 3611.4731066422. The cubic root of 13042738 is about 235.3908570273.

Adding to 13042738 its reverse (83724031), we get a palindrome (96766769).

The spelling of 13042738 in words is "thirteen million, forty-two thousand, seven hundred thirty-eight".