3725281 has 4 divisors (see below), whose sum is σ = 4257472. Its totient is φ = 3193092.

The previous prime is 3725279. The next prime is 3725303. The reversal of 3725281 is 1825273.

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 not a de Polignac number, because 3725281 - 2¹ = 3725279 is a prime.

It is a super-2 number, since 2×3725281² = 27755437057922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3725221) 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, 266085 + ... + 266098.

It is an arithmetic number, because the mean of its divisors is an integer number (1064368).

Almost surely, 2^3725281 is an apocalyptic number.

It is an amenable number.

3725281 is a deficient number, since it is larger than the sum of its proper divisors (532191).

3725281 is an equidigital number, since it uses as much as digits as its factorization.

3725281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532190.

The product of its digits is 3360, while the sum is 28.

The square root of 3725281 is about 1930.0987021393. The cubic root of 3725281 is about 155.0195050029.

The spelling of 3725281 in words is "three million, seven hundred twenty-five thousand, two hundred eighty-one".