1166242642 has 4 divisors (see below), whose sum is σ = 1749363966. Its totient is φ = 583121320.

The previous prime is 1166242639. The next prime is 1166242643. The reversal of 1166242642 is 2462426611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2462426611 = 151 ⋅16307461.

It can be written as a sum of positive squares in only one way, i.e., 860307561 + 305935081 = 29331^2 + 17491^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1166242598 and 1166242607.

It is not an unprimeable number, because it can be changed into a prime (1166242643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 291560659 + ... + 291560662.

Almost surely, 2^1166242642 is an apocalyptic number.

1166242642 is a deficient number, since it is larger than the sum of its proper divisors (583121324).

1166242642 is an equidigital number, since it uses as much as digits as its factorization.

1166242642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583121323.

The product of its digits is 27648, while the sum is 34.

The square root of 1166242642 is about 34150.2949035583. The cubic root of 1166242642 is about 1052.5990464278.

The spelling of 1166242642 in words is "one billion, one hundred sixty-six million, two hundred forty-two thousand, six hundred forty-two".