13400505 has 32 divisors (see below), whose sum is σ = 25228800. Its totient is φ = 6725376.

The previous prime is 13400503. The next prime is 13400507. The reversal of 13400505 is 50500431.

It is an interprime number because it is at equal distance from previous prime (13400503) and next prime (13400507).

It is not a de Polignac number, because 13400505 - 2¹ = 13400503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13400501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 625 + ... + 5214.

It is an arithmetic number, because the mean of its divisors is an integer number (788400).

Almost surely, 2^13400505 is an apocalyptic number.

13400505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13400505 is a deficient number, since it is larger than the sum of its proper divisors (11828295).

13400505 is a wasteful number, since it uses less digits than its factorization.

13400505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5870 (or 5864 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 13400505 is about 3660.6700206383. The cubic root of 13400505 is about 237.5237575495.

Adding to 13400505 its reverse (50500431), we get a palindrome (63900936).

The spelling of 13400505 in words is "thirteen million, four hundred thousand, five hundred five".