13405457 has 4 divisors (see below), whose sum is σ = 14436660. Its totient is φ = 12374256.

The previous prime is 13405451. The next prime is 13405459. The reversal of 13405457 is 75450431.

13405457 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.

It can be written as a sum of positive squares in 2 ways, for example, as 5202961 + 8202496 = 2281^2 + 2864^2 .

It is a cyclic number.

It is not a de Polignac number, because 13405457 - 2¹⁸ = 13143313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13405451) 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, 515582 + ... + 515607.

It is an arithmetic number, because the mean of its divisors is an integer number (3609165).

Almost surely, 2^13405457 is an apocalyptic number.

It is an amenable number.

13405457 is a deficient number, since it is larger than the sum of its proper divisors (1031203).

13405457 is a wasteful number, since it uses less digits than its factorization.

13405457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031202.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 13405457 is about 3661.3463370733. The cubic root of 13405457 is about 237.5530119891.

Adding to 13405457 its reverse (75450431), we get a palindrome (88855888).

The spelling of 13405457 in words is "thirteen million, four hundred five thousand, four hundred fifty-seven".