13656742 has 16 divisors (see below), whose sum is σ = 22500864. Its totient is φ = 6165000.

The previous prime is 13656739. The next prime is 13656749. The reversal of 13656742 is 24765631.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13656698 and 13656707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13656749) 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, 1267 + ... + 5377.

It is an arithmetic number, because the mean of its divisors is an integer number (1406304).

Almost surely, 2^13656742 is an apocalyptic number.

13656742 is a deficient number, since it is larger than the sum of its proper divisors (8844122).

13656742 is a wasteful number, since it uses less digits than its factorization.

13656742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4275.

The product of its digits is 30240, while the sum is 34.

The square root of 13656742 is about 3695.5029427671. The cubic root of 13656742 is about 239.0281416184.

Subtracting 13656742 from its reverse (24765631), we obtain a square (11108889 = 3333²).

The spelling of 13656742 in words is "thirteen million, six hundred fifty-six thousand, seven hundred forty-two".