1242500011 has 4 divisors (see below), whose sum is σ = 1251439000. Its totient is φ = 1233561024.

The previous prime is 1242500009. The next prime is 1242500069. The reversal of 1242500011 is 1100052421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1242500011 - 2¹ = 1242500009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242500711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4469286 + ... + 4469563.

It is an arithmetic number, because the mean of its divisors is an integer number (312859750).

Almost surely, 2^1242500011 is an apocalyptic number.

1242500011 is a deficient number, since it is larger than the sum of its proper divisors (8938989).

1242500011 is an equidigital number, since it uses as much as digits as its factorization.

1242500011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8938988.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1242500011 is about 35249.1136200614. The cubic root of 1242500011 is about 1075.0585902085.

Adding to 1242500011 its reverse (1100052421), we get a palindrome (2342552432).

The spelling of 1242500011 in words is "one billion, two hundred forty-two million, five hundred thousand, eleven".