13609142 has 4 divisors (see below), whose sum is σ = 20413716. Its totient is φ = 6804570.

The previous prime is 13609121. The next prime is 13609147. The reversal of 13609142 is 24190631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24190631 = 53 ⋅456427.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13609147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3402284 + ... + 3402287.

It is an arithmetic number, because the mean of its divisors is an integer number (5103429).

Almost surely, 2^13609142 is an apocalyptic number.

13609142 is a deficient number, since it is larger than the sum of its proper divisors (6804574).

13609142 is an equidigital number, since it uses as much as digits as its factorization.

13609142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6804573.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 13609142 is about 3689.0570610930. The cubic root of 13609142 is about 238.7501108339.

Adding to 13609142 its reverse (24190631), we get a palindrome (37799773).

The spelling of 13609142 in words is "thirteen million, six hundred nine thousand, one hundred forty-two".