3251981 has 8 divisors (see below), whose sum is σ = 3462264. Its totient is φ = 3043840.

The previous prime is 3251933. The next prime is 3251999. The reversal of 3251981 is 1891523.

It can be written as a sum of positive squares in 4 ways, for example, as 220900 + 3031081 = 470^2 + 1741^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3251981 - 2⁶ = 3251917 is a prime.

It is a super-2 number, since 2×3251981² = 21150760848722, 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 (3251681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3551 + ... + 4371.

It is an arithmetic number, because the mean of its divisors is an integer number (432783).

Almost surely, 2^3251981 is an apocalyptic number.

It is an amenable number.

3251981 is a deficient number, since it is larger than the sum of its proper divisors (210283).

3251981 is a wasteful number, since it uses less digits than its factorization.

3251981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071.

The product of its digits is 2160, while the sum is 29.

The square root of 3251981 is about 1803.3249845771. The cubic root of 3251981 is about 148.1548932292.

The spelling of 3251981 in words is "three million, two hundred fifty-one thousand, nine hundred eighty-one".