4121657 has 2 divisors, whose sum is σ = 4121658. Its totient is φ = 4121656.

The previous prime is 4121647. The next prime is 4121687. The reversal of 4121657 is 7561214.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3984016 + 137641 = 1996^2 + 371^2 .

It is a cyclic number.

It is not a de Polignac number, because 4121657 - 2⁴ = 4121641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4121647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2060828 + 2060829.

It is an arithmetic number, because the mean of its divisors is an integer number (2060829).

Almost surely, 2^4121657 is an apocalyptic number.

It is an amenable number.

4121657 is a deficient number, since it is larger than the sum of its proper divisors (1).

4121657 is an equidigital number, since it uses as much as digits as its factorization.

4121657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 26.

The square root of 4121657 is about 2030.1864446400. The cubic root of 4121657 is about 160.3333803978. Note that the first 4 decimals are identical.

The spelling of 4121657 in words is "four million, one hundred twenty-one thousand, six hundred fifty-seven".