1225501 has 2 divisors, whose sum is σ = 1225502. Its totient is φ = 1225500.

The previous prime is 1225493. The next prime is 1225507. The reversal of 1225501 is 1055221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 900601 + 324900 = 949^2 + 570^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225501 - 2³ = 1225493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225507) 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, 612750 + 612751.

It is an arithmetic number, because the mean of its divisors is an integer number (612751).

2^1225501 is an apocalyptic number.

It is an amenable number.

1225501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225501 is an equidigital number, since it uses as much as digits as its factorization.

1225501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1225501 is about 1107.0234866524. The cubic root of 1225501 is about 107.0133328365.

The spelling of 1225501 in words is "one million, two hundred twenty-five thousand, five hundred one".