3621857 has 2 divisors, whose sum is σ = 3621858. Its totient is φ = 3621856.

The previous prime is 3621851. The next prime is 3621881. The reversal of 3621857 is 7581263.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2819041 + 802816 = 1679^2 + 896^2 .

It is a cyclic number.

It is not a de Polignac number, because 3621857 - 2¹⁴ = 3605473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3621851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1810928 + 1810929.

It is an arithmetic number, because the mean of its divisors is an integer number (1810929).

Almost surely, 2^3621857 is an apocalyptic number.

It is an amenable number.

3621857 is a deficient number, since it is larger than the sum of its proper divisors (1).

3621857 is an equidigital number, since it uses as much as digits as its factorization.

3621857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 3621857 is about 1903.1177052405. The cubic root of 3621857 is about 153.5714317031.

The spelling of 3621857 in words is "three million, six hundred twenty-one thousand, eight hundred fifty-seven".