1225717543 has 2 divisors, whose sum is σ = 1225717544. Its totient is φ = 1225717542.

The previous prime is 1225717501. The next prime is 1225717547. The reversal of 1225717543 is 3457175221.

It is a strong prime.

It is an emirp because it is prime and its reverse (3457175221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225717543 - 2²⁵ = 1192163111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225717547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612858771 + 612858772.

It is an arithmetic number, because the mean of its divisors is an integer number (612858772).

Almost surely, 2^1225717543 is an apocalyptic number.

1225717543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225717543 is an equidigital number, since it uses as much as digits as its factorization.

1225717543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58800, while the sum is 37.

The square root of 1225717543 is about 35010.2491136524. The cubic root of 1225717543 is about 1070.1963546250.

The spelling of 1225717543 in words is "one billion, two hundred twenty-five million, seven hundred seventeen thousand, five hundred forty-three".