13749146 has 4 divisors (see below), whose sum is σ = 20623722. Its totient is φ = 6874572.

The previous prime is 13749133. The next prime is 13749149. The reversal of 13749146 is 64194731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64194731 = 281 ⋅228451.

It can be written as a sum of positive squares in only one way, i.e., 10491121 + 3258025 = 3239^2 + 1805^2 .

It is not an unprimeable number, because it can be changed into a prime (13749149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3437285 + ... + 3437288.

Almost surely, 2^13749146 is an apocalyptic number.

13749146 is a deficient number, since it is larger than the sum of its proper divisors (6874576).

13749146 is an equidigital number, since it uses as much as digits as its factorization.

13749146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6874575.

The product of its digits is 18144, while the sum is 35.

The square root of 13749146 is about 3707.9840884232. The cubic root of 13749146 is about 239.5660329049.

The spelling of 13749146 in words is "thirteen million, seven hundred forty-nine thousand, one hundred forty-six".