3780281 has 2 divisors, whose sum is σ = 3780282. Its totient is φ = 3780280.

The previous prime is 3780251. The next prime is 3780313. The reversal of 3780281 is 1820873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2941225 + 839056 = 1715^2 + 916^2 .

It is a cyclic number.

It is not a de Polignac number, because 3780281 - 2¹⁴ = 3763897 is a prime.

It is a super-2 number, since 2×3780281² = 28581048877922, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (3780251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1890140 + 1890141.

It is an arithmetic number, because the mean of its divisors is an integer number (1890141).

Almost surely, 2^3780281 is an apocalyptic number.

It is an amenable number.

3780281 is a deficient number, since it is larger than the sum of its proper divisors (1).

3780281 is an equidigital number, since it uses as much as digits as its factorization.

3780281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 3780281 is about 1944.2944735816. The cubic root of 3780281 is about 155.7786829886.

The spelling of 3780281 in words is "three million, seven hundred eighty thousand, two hundred eighty-one".