13972642 has 4 divisors (see below), whose sum is σ = 20958966. Its totient is φ = 6986320.

The previous prime is 13972597. The next prime is 13972669. The reversal of 13972642 is 24627931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10764961 + 3207681 = 3281^2 + 1791^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13972598 and 13972607.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3493159 + ... + 3493162.

Almost surely, 2^13972642 is an apocalyptic number.

13972642 is a deficient number, since it is larger than the sum of its proper divisors (6986324).

13972642 is an equidigital number, since it uses as much as digits as its factorization.

13972642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6986323.

The product of its digits is 18144, while the sum is 34.

The square root of 13972642 is about 3737.9997324773. Note that the first 3 decimals coincide. The cubic root of 13972642 is about 240.8571319684.

The spelling of 13972642 in words is "thirteen million, nine hundred seventy-two thousand, six hundred forty-two".