13981426 has 16 divisors (see below), whose sum is σ = 21513024. Its totient is φ = 6812784.

The previous prime is 13981421. The next prime is 13981427. The reversal of 13981426 is 62418931.

It is a junction number, because it is equal to n+sod(n) for n = 13981391 and 13981400.

It is not an unprimeable number, because it can be changed into a prime (13981421) 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, 13296 + ... + 14308.

It is an arithmetic number, because the mean of its divisors is an integer number (1344564).

Almost surely, 2^13981426 is an apocalyptic number.

13981426 is a deficient number, since it is larger than the sum of its proper divisors (7531598).

13981426 is a wasteful number, since it uses less digits than its factorization.

13981426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185.

The product of its digits is 10368, while the sum is 34.

The square root of 13981426 is about 3739.1745078292. The cubic root of 13981426 is about 240.9075935741.

The spelling of 13981426 in words is "thirteen million, nine hundred eighty-one thousand, four hundred twenty-six".