1242626573 has 2 divisors, whose sum is σ = 1242626574. Its totient is φ = 1242626572.

The previous prime is 1242626549. The next prime is 1242626591. The reversal of 1242626573 is 3756262421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1232501449 + 10125124 = 35107^2 + 3182^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242626573 - 2²⁸ = 974191117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242626873) 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, 621313286 + 621313287.

It is an arithmetic number, because the mean of its divisors is an integer number (621313287).

Almost surely, 2^1242626573 is an apocalyptic number.

It is an amenable number.

1242626573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242626573 is an equidigital number, since it uses as much as digits as its factorization.

1242626573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 38.

The square root of 1242626573 is about 35250.9088251636. The cubic root of 1242626573 is about 1075.0950910655.

Adding to 1242626573 its reverse (3756262421), we get a palindrome (4998888994).

The spelling of 1242626573 in words is "one billion, two hundred forty-two million, six hundred twenty-six thousand, five hundred seventy-three".