1226557 has 2 divisors, whose sum is σ = 1226558. Its totient is φ = 1226556.

The previous prime is 1226549. The next prime is 1226581. The reversal of 1226557 is 7556221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 962361 + 264196 = 981^2 + 514^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226557 - 2³ = 1226549 is a prime.

It is the 1108-th Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1226257) by changing a digit.

It is a nontrivial repunit in base 1107.

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, 613278 + 613279.

It is an arithmetic number, because the mean of its divisors is an integer number (613279).

2^1226557 is an apocalyptic number.

It is an amenable number.

1226557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226557 is an equidigital number, since it uses as much as digits as its factorization.

1226557 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1226557 is about 1107.5003386004. The cubic root of 1226557 is about 107.0440613947.

It can be divided in two parts, 12 and 26557, that added together give a square (26569 = 163²).

The spelling of 1226557 in words is "one million, two hundred twenty-six thousand, five hundred fifty-seven".