13972505 has 12 divisors (see below), whose sum is σ = 17698212. Its totient is φ = 10588320.

The previous prime is 13972481. The next prime is 13972507. The reversal of 13972505 is 50527931.

It can be written as a sum of positive squares in 2 ways, for example, as 3904576 + 10067929 = 1976^2 + 3173^2 .

It is not a de Polignac number, because 13972505 - 2¹⁰ = 13971481 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13972507) 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 11 ways as a sum of consecutive naturals, for example, 2066 + ... + 5675.

It is an arithmetic number, because the mean of its divisors is an integer number (1474851).

Almost surely, 2^13972505 is an apocalyptic number.

It is an amenable number.

13972505 is a deficient number, since it is larger than the sum of its proper divisors (3725707).

13972505 is an equidigital number, since it uses as much as digits as its factorization.

13972505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7784 (or 7765 counting only the distinct ones).

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 13972505 is about 3737.9814071234. The cubic root of 13972505 is about 240.8563447745.

The spelling of 13972505 in words is "thirteen million, nine hundred seventy-two thousand, five hundred five".