1242170566 has 32 divisors (see below), whose sum is σ = 2302046208. Its totient is φ = 489520800.

The previous prime is 1242170561. The next prime is 1242170639. The reversal of 1242170566 is 6650712421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242170561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34891 + ... + 60841.

It is an arithmetic number, because the mean of its divisors is an integer number (71938944).

Almost surely, 2^1242170566 is an apocalyptic number.

1242170566 is a deficient number, since it is larger than the sum of its proper divisors (1059875642).

1242170566 is a wasteful number, since it uses less digits than its factorization.

1242170566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26236.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 1242170566 is about 35244.4402140252. The cubic root of 1242170566 is about 1074.9635656662.

Adding to 1242170566 its reverse (6650712421), we get a palindrome (7892882987).

The spelling of 1242170566 in words is "one billion, two hundred forty-two million, one hundred seventy thousand, five hundred sixty-six".