1242011166 has 16 divisors (see below), whose sum is σ = 2709842688. Its totient is φ = 376367000.

The previous prime is 1242011149. The next prime is 1242011189. The reversal of 1242011166 is 6611102421.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9409110 + ... + 9409241.

It is an arithmetic number, because the mean of its divisors is an integer number (169365168).

Almost surely, 2^1242011166 is an apocalyptic number.

1242011166 is an abundant number, since it is smaller than the sum of its proper divisors (1467831522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242011166 is a wasteful number, since it uses less digits than its factorization.

1242011166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18818367.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1242011166 is about 35242.1787918965. The cubic root of 1242011166 is about 1074.9175825763.

Adding to 1242011166 its reverse (6611102421), we get a palindrome (7853113587).

The spelling of 1242011166 in words is "one billion, two hundred forty-two million, eleven thousand, one hundred sixty-six".