13642505 has 8 divisors (see below), whose sum is σ = 16412424. Its totient is φ = 10886400.

The previous prime is 13642501. The next prime is 13642507. The reversal of 13642505 is 50524631.

It can be written as a sum of positive squares in 4 ways, for example, as 797449 + 12845056 = 893^2 + 3584^2 .

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

It is not a de Polignac number, because 13642505 - 2² = 13642501 is a prime.

It is a super-2 number, since 2×13642505² = 372235885350050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13642501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1136 + ... + 5345.

It is an arithmetic number, because the mean of its divisors is an integer number (2051553).

Almost surely, 2^13642505 is an apocalyptic number.

It is an amenable number.

13642505 is a deficient number, since it is larger than the sum of its proper divisors (2769919).

13642505 is an equidigital number, since it uses as much as digits as its factorization.

13642505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6907.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 13642505 is about 3693.5761803434. The cubic root of 13642505 is about 238.9450513547.

The spelling of 13642505 in words is "thirteen million, six hundred forty-two thousand, five hundred five".