1225787 has 2 divisors, whose sum is σ = 1225788. Its totient is φ = 1225786.

The previous prime is 1225769. The next prime is 1225817. The reversal of 1225787 is 7875221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1225787 - 2⁶ = 1225723 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1225727) 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, 612893 + 612894.

It is an arithmetic number, because the mean of its divisors is an integer number (612894).

2^1225787 is an apocalyptic number.

1225787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225787 is an equidigital number, since it uses as much as digits as its factorization.

1225787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7840, while the sum is 32.

The square root of 1225787 is about 1107.1526543345. The cubic root of 1225787 is about 107.0216568968.

The spelling of 1225787 in words is "one million, two hundred twenty-five thousand, seven hundred eighty-seven".