3481721 has 2 divisors, whose sum is σ = 3481722. Its totient is φ = 3481720.

The previous prime is 3481691. The next prime is 3481741. The reversal of 3481721 is 1271843.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3474496 + 7225 = 1864^2 + 85^2 .

It is an emirp because it is prime and its reverse (1271843) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3481721 - 2⁶ = 3481657 is a prime.

It is a super-2 number, since 2×3481721² = 24244762243682, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3481741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1740860 + 1740861.

It is an arithmetic number, because the mean of its divisors is an integer number (1740861).

Almost surely, 2^3481721 is an apocalyptic number.

It is an amenable number.

3481721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3481721 is an equidigital number, since it uses as much as digits as its factorization.

3481721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 26.

The square root of 3481721 is about 1865.9370300200. The cubic root of 3481721 is about 151.5646737422.

The spelling of 3481721 in words is "three million, four hundred eighty-one thousand, seven hundred twenty-one".