3749981 has 4 divisors (see below), whose sum is σ = 3813600. Its totient is φ = 3686364.

The previous prime is 3749971. The next prime is 3750001. The reversal of 3749981 is 1899473.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3749981 - 2¹⁰ = 3748957 is a prime.

It is a super-2 number, since 2×3749981² = 28124715000722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3749951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31721 + ... + 31838.

It is an arithmetic number, because the mean of its divisors is an integer number (953400).

Almost surely, 2^3749981 is an apocalyptic number.

It is an amenable number.

3749981 is a deficient number, since it is larger than the sum of its proper divisors (63619).

3749981 is an equidigital number, since it uses as much as digits as its factorization.

3749981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63618.

The product of its digits is 54432, while the sum is 41.

The square root of 3749981 is about 1936.4867673186. The cubic root of 3749981 is about 155.3613629087.

The spelling of 3749981 in words is "three million, seven hundred forty-nine thousand, nine hundred eighty-one".