3734221 has 4 divisors (see below), whose sum is σ = 3804732. Its totient is φ = 3663712.

The previous prime is 3734219. The next prime is 3734261. The reversal of 3734221 is 1224373.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1224373 = 89 ⋅13757.

It can be written as a sum of positive squares in 2 ways, for example, as 1028196 + 2706025 = 1014^2 + 1645^2 .

It is a cyclic number.

It is not a de Polignac number, because 3734221 - 2¹ = 3734219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3734192 and 3734201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3734261) 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, 35176 + ... + 35281.

It is an arithmetic number, because the mean of its divisors is an integer number (951183).

Almost surely, 2^3734221 is an apocalyptic number.

It is an amenable number.

3734221 is a deficient number, since it is larger than the sum of its proper divisors (70511).

3734221 is an equidigital number, since it uses as much as digits as its factorization.

3734221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70510.

The product of its digits is 1008, while the sum is 22.

The square root of 3734221 is about 1932.4132580791. The cubic root of 3734221 is about 155.1434121869.

Adding to 3734221 its reverse (1224373), we get a palindrome (4958594).

The spelling of 3734221 in words is "three million, seven hundred thirty-four thousand, two hundred twenty-one".