1242566125 has 16 divisors (see below), whose sum is σ = 1641944304. Its totient is φ = 935577600.

The previous prime is 1242566107. The next prime is 1242566173. The reversal of 1242566125 is 5216652421.

It can be written as a sum of positive squares in 8 ways, for example, as 78801129 + 1163764996 = 8877^2 + 34114^2 .

It is not a de Polignac number, because 1242566125 - 2⁵ = 1242566093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 290244 + ... + 294493.

It is an arithmetic number, because the mean of its divisors is an integer number (102621519).

Almost surely, 2^1242566125 is an apocalyptic number.

It is an amenable number.

1242566125 is a deficient number, since it is larger than the sum of its proper divisors (399378179).

1242566125 is an equidigital number, since it uses as much as digits as its factorization.

1242566125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584769 (or 584759 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 1242566125 is about 35250.0514184022. The cubic root of 1242566125 is about 1075.0776579918.

The spelling of 1242566125 in words is "one billion, two hundred forty-two million, five hundred sixty-six thousand, one hundred twenty-five".