1242500173 has 2 divisors, whose sum is σ = 1242500174. Its totient is φ = 1242500172.

The previous prime is 1242500143. The next prime is 1242500177. The reversal of 1242500173 is 3710052421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1110089124 + 132411049 = 33318^2 + 11507^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242500173 - 2⁵ = 1242500141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242500177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621250086 + 621250087.

It is an arithmetic number, because the mean of its divisors is an integer number (621250087).

Almost surely, 2^1242500173 is an apocalyptic number.

It is an amenable number.

1242500173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242500173 is an equidigital number, since it uses as much as digits as its factorization.

1242500173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1242500173 is about 35249.1159179915. The cubic root of 1242500173 is about 1075.0586369313.

Adding to 1242500173 its reverse (3710052421), we get a palindrome (4952552594).

The spelling of 1242500173 in words is "one billion, two hundred forty-two million, five hundred thousand, one hundred seventy-three".