3745281 has 4 divisors (see below), whose sum is σ = 4993712. Its totient is φ = 2496852.

The previous prime is 3745249. The next prime is 3745283. The reversal of 3745281 is 1825473.

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 3745281 - 2⁵ = 3745249 is a prime.

It is a super-2 number, since 2×3745281² = 28054259537922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3745283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624211 + ... + 624216.

It is an arithmetic number, because the mean of its divisors is an integer number (1248428).

Almost surely, 2^3745281 is an apocalyptic number.

It is an amenable number.

3745281 is a deficient number, since it is larger than the sum of its proper divisors (1248431).

3745281 is a wasteful number, since it uses less digits than its factorization.

3745281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248430.

The product of its digits is 6720, while the sum is 30.

The square root of 3745281 is about 1935.2728489802. The cubic root of 3745281 is about 155.2964289192.

The spelling of 3745281 in words is "three million, seven hundred forty-five thousand, two hundred eighty-one".