13045731 has 4 divisors (see below), whose sum is σ = 17394312. Its totient is φ = 8697152.

The previous prime is 13045729. The next prime is 13045751. The reversal of 13045731 is 13754031.

13045731 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13754031 = 3 ⋅4584677.

It is a cyclic number.

It is not a de Polignac number, because 13045731 - 2¹ = 13045729 is a prime.

It is a super-2 number, since 2×13045731² = 340382194648722, which contains 22 as substring.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (13045751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2174286 + ... + 2174291.

It is an arithmetic number, because the mean of its divisors is an integer number (4348578).

Almost surely, 2^13045731 is an apocalyptic number.

13045731 is a deficient number, since it is larger than the sum of its proper divisors (4348581).

13045731 is an equidigital number, since it uses as much as digits as its factorization.

13045731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4348580.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 13045731 is about 3611.8874567184. The cubic root of 13045731 is about 235.4088611956.

Adding to 13045731 its reverse (13754031), we get a palindrome (26799762).

The spelling of 13045731 in words is "thirteen million, forty-five thousand, seven hundred thirty-one".