3253721 has 4 divisors (see below), whose sum is σ = 3302352. Its totient is φ = 3205092.

The previous prime is 3253711. The next prime is 3253739. The reversal of 3253721 is 1273523.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1273523 = 337 ⋅3779.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3253721 is a prime.

It is a super-3 number, since 3×3253721³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3253711) 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, 24215 + ... + 24348.

It is an arithmetic number, because the mean of its divisors is an integer number (825588).

Almost surely, 2^3253721 is an apocalyptic number.

It is an amenable number.

3253721 is a deficient number, since it is larger than the sum of its proper divisors (48631).

3253721 is an equidigital number, since it uses as much as digits as its factorization.

3253721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48630.

The product of its digits is 1260, while the sum is 23.

The square root of 3253721 is about 1803.8073622203. The cubic root of 3253721 is about 148.1813123616.

The spelling of 3253721 in words is "three million, two hundred fifty-three thousand, seven hundred twenty-one".