3747581 has 2 divisors, whose sum is σ = 3747582. Its totient is φ = 3747580.

The previous prime is 3747547. The next prime is 3747587. The reversal of 3747581 is 1857473.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3740356 + 7225 = 1934^2 + 85^2 .

It is an emirp because it is prime and its reverse (1857473) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3747581 - 2¹⁰ = 3746557 is a prime.

It is a super-2 number, since 2×3747581² = 28088726703122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3747587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1873790 + 1873791.

It is an arithmetic number, because the mean of its divisors is an integer number (1873791).

Almost surely, 2^3747581 is an apocalyptic number.

It is an amenable number.

3747581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3747581 is an equidigital number, since it uses as much as digits as its factorization.

3747581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23520, while the sum is 35.

The square root of 3747581 is about 1935.8669892325. The cubic root of 3747581 is about 155.3282119101.

The spelling of 3747581 in words is "three million, seven hundred forty-seven thousand, five hundred eighty-one".