3749281 has 2 divisors, whose sum is σ = 3749282. Its totient is φ = 3749280.

The previous prime is 3749267. The next prime is 3749293. The reversal of 3749281 is 1829473.

3749281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3389281 + 360000 = 1841^2 + 600^2 .

It is an emirp because it is prime and its reverse (1829473) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3749281 - 2⁷ = 3749153 is a prime.

It is a super-2 number, since 2×3749281² = 28114216033922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3749881) 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, 1874640 + 1874641.

It is an arithmetic number, because the mean of its divisors is an integer number (1874641).

Almost surely, 2^3749281 is an apocalyptic number.

It is an amenable number.

3749281 is a deficient number, since it is larger than the sum of its proper divisors (1).

3749281 is an equidigital number, since it uses as much as digits as its factorization.

3749281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 3749281 is about 1936.3060192025. The cubic root of 3749281 is about 155.3516953289.

It can be divided in two parts, 37492 and 81, that added together give a palindrome (37573).

The spelling of 3749281 in words is "three million, seven hundred forty-nine thousand, two hundred eighty-one".