6557401 has 2 divisors, whose sum is σ = 6557402. Its totient is φ = 6557400.

The previous prime is 6557381. The next prime is 6557407. The reversal of 6557401 is 1047556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5645376 + 912025 = 2376^2 + 955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6557401 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6557401.

It is not a weakly prime, because it can be changed into another prime (6557407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3278700 + 3278701.

It is an arithmetic number, because the mean of its divisors is an integer number (3278701).

Almost surely, 2^6557401 is an apocalyptic number.

It is an amenable number.

6557401 is a deficient number, since it is larger than the sum of its proper divisors (1).

6557401 is an equidigital number, since it uses as much as digits as its factorization.

6557401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 6557401 is about 2560.7422752007. The cubic root of 6557401 is about 187.1733072620.

The spelling of 6557401 in words is "six million, five hundred fifty-seven thousand, four hundred one".