1225879 has 2 divisors, whose sum is σ = 1225880. Its totient is φ = 1225878.

The previous prime is 1225871. The next prime is 1225883. The reversal of 1225879 is 9785221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1225879 - 2³ = 1225871 is a prime.

1225879 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225871) 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, 612939 + 612940.

It is an arithmetic number, because the mean of its divisors is an integer number (612940).

2^1225879 is an apocalyptic number.

1225879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225879 is an equidigital number, since it uses as much as digits as its factorization.

1225879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 34.

The square root of 1225879 is about 1107.1942015744. The cubic root of 1225879 is about 107.0243342913.

The spelling of 1225879 in words is "one million, two hundred twenty-five thousand, eight hundred seventy-nine".