3621257 has 2 divisors, whose sum is σ = 3621258. Its totient is φ = 3621256.

The previous prime is 3621253. The next prime is 3621263. The reversal of 3621257 is 7521263.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3225616 + 395641 = 1796^2 + 629^2 .

It is a cyclic number.

It is not a de Polignac number, because 3621257 - 2² = 3621253 is a prime.

It is a super-2 number, since 2×3621257² = 26227004520098, which contains 22 as substring.

It is equal to p₂₅₈₁₇₃ and since 3621257 and 258173 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (3621251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1810628 + 1810629.

It is an arithmetic number, because the mean of its divisors is an integer number (1810629).

Almost surely, 2^3621257 is an apocalyptic number.

It is an amenable number.

3621257 is a deficient number, since it is larger than the sum of its proper divisors (1).

3621257 is an equidigital number, since it uses as much as digits as its factorization.

3621257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 26.

The square root of 3621257 is about 1902.9600626393. The cubic root of 3621257 is about 153.5629509755.

The spelling of 3621257 in words is "three million, six hundred twenty-one thousand, two hundred fifty-seven".