1242125107 has 2 divisors, whose sum is σ = 1242125108. Its totient is φ = 1242125106.

The previous prime is 1242125099. The next prime is 1242125123. The reversal of 1242125107 is 7015212421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1242125107 - 2³ = 1242125099 is a prime.

It is a super-2 number, since 2×1242125107² = 3085749562879522898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1242125147) 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, 621062553 + 621062554.

It is an arithmetic number, because the mean of its divisors is an integer number (621062554).

Almost surely, 2^1242125107 is an apocalyptic number.

1242125107 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242125107 is an equidigital number, since it uses as much as digits as its factorization.

1242125107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1242125107 is about 35243.7952978961. The cubic root of 1242125107 is about 1074.9504522323.

Adding to 1242125107 its reverse (7015212421), we get a palindrome (8257337528).

The spelling of 1242125107 in words is "one billion, two hundred forty-two million, one hundred twenty-five thousand, one hundred seven".