13042405 has 8 divisors (see below), whose sum is σ = 15678072. Its totient is φ = 10415808.

The previous prime is 13042339. The next prime is 13042409. The reversal of 13042405 is 50424031.

It can be written as a sum of positive squares in 4 ways, for example, as 9474084 + 3568321 = 3078^2 + 1889^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13042405 - 2⁷ = 13042277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13042409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1459 + ... + 5311.

It is an arithmetic number, because the mean of its divisors is an integer number (1959759).

Almost surely, 2^13042405 is an apocalyptic number.

It is an amenable number.

13042405 is a deficient number, since it is larger than the sum of its proper divisors (2635667).

13042405 is an equidigital number, since it uses as much as digits as its factorization.

13042405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4535.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 13042405 is about 3611.4270032772. The cubic root of 13042405 is about 235.3888537203.

Adding to 13042405 its reverse (50424031), we get a palindrome (63466436).

The spelling of 13042405 in words is "thirteen million, forty-two thousand, four hundred five".