1225541 has 2 divisors, whose sum is σ = 1225542. Its totient is φ = 1225540.

The previous prime is 1225529. The next prime is 1225559. The reversal of 1225541 is 1455221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 894916 + 330625 = 946^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225541 - 2¹⁸ = 963397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612770 + 612771.

It is an arithmetic number, because the mean of its divisors is an integer number (612771).

2^1225541 is an apocalyptic number.

It is an amenable number.

1225541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225541 is an equidigital number, since it uses as much as digits as its factorization.

1225541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 400, while the sum is 20.

The square root of 1225541 is about 1107.0415529690. The cubic root of 1225541 is about 107.0144971186.

The spelling of 1225541 in words is "one million, two hundred twenty-five thousand, five hundred forty-one".