13637242 has 4 divisors (see below), whose sum is σ = 20455866. Its totient is φ = 6818620.

The previous prime is 13637237. The next prime is 13637249. The reversal of 13637242 is 24273631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24273631 = 67 ⋅362293.

It can be written as a sum of positive squares in only one way, i.e., 9916201 + 3721041 = 3149^2 + 1929^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13637242.

It is not an unprimeable number, because it can be changed into a prime (13637249) 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 as a sum of consecutive naturals, namely, 3409309 + ... + 3409312.

Almost surely, 2^13637242 is an apocalyptic number.

13637242 is a deficient number, since it is larger than the sum of its proper divisors (6818624).

13637242 is an equidigital number, since it uses as much as digits as its factorization.

13637242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6818623.

The product of its digits is 6048, while the sum is 28.

The square root of 13637242 is about 3692.8636584634. The cubic root of 13637242 is about 238.9143206945.

It can be divided in two parts, 1363724 and 2, that added together give a triangular number (1363726 = T₁₆₅₁).

The spelling of 13637242 in words is "thirteen million, six hundred thirty-seven thousand, two hundred forty-two".