3420257 has 2 divisors, whose sum is σ = 3420258. Its totient is φ = 3420256.

The previous prime is 3420253. The next prime is 3420271. The reversal of 3420257 is 7520243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3389281 + 30976 = 1841^2 + 176^2 .

It is a cyclic number.

It is not a de Polignac number, because 3420257 - 2² = 3420253 is a prime.

It is a Chen prime.

It is equal to p₂₄₄₉₀₄ and since 3420257 and 244904 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 (3420251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710128 + 1710129.

It is an arithmetic number, because the mean of its divisors is an integer number (1710129).

Almost surely, 2^3420257 is an apocalyptic number.

It is an amenable number.

3420257 is a deficient number, since it is larger than the sum of its proper divisors (1).

3420257 is an equidigital number, since it uses as much as digits as its factorization.

3420257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 3420257 is about 1849.3936844274. The cubic root of 3420257 is about 150.6674992993.

The spelling of 3420257 in words is "three million, four hundred twenty thousand, two hundred fifty-seven".