3725781 has 4 divisors (see below), whose sum is σ = 4967712. Its totient is φ = 2483852.

The previous prime is 3725759. The next prime is 3725783. The reversal of 3725781 is 1875273.

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 3725781 - 2¹⁰ = 3724757 is a prime.

It is a super-2 number, since 2×3725781² = 27762888119922, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3725783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620961 + ... + 620966.

It is an arithmetic number, because the mean of its divisors is an integer number (1241928).

Almost surely, 2^3725781 is an apocalyptic number.

It is an amenable number.

3725781 is a deficient number, since it is larger than the sum of its proper divisors (1241931).

3725781 is a wasteful number, since it uses less digits than its factorization.

3725781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241930.

The product of its digits is 11760, while the sum is 33.

The square root of 3725781 is about 1930.2282248480. The cubic root of 3725781 is about 155.0264401652.

The spelling of 3725781 in words is "three million, seven hundred twenty-five thousand, seven hundred eighty-one".