3451621 has 2 divisors, whose sum is σ = 3451622. Its totient is φ = 3451620.

The previous prime is 3451607. The next prime is 3451627. The reversal of 3451621 is 1261543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2528100 + 923521 = 1590^2 + 961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3451621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3451592 and 3451601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3451627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1725810 + 1725811.

It is an arithmetic number, because the mean of its divisors is an integer number (1725811).

Almost surely, 2^3451621 is an apocalyptic number.

It is an amenable number.

3451621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3451621 is an equidigital number, since it uses as much as digits as its factorization.

3451621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 22.

The square root of 3451621 is about 1857.8538693880. The cubic root of 3451621 is about 151.1266425829.

The spelling of 3451621 in words is "three million, four hundred fifty-one thousand, six hundred twenty-one".