1242431566 has 8 divisors (see below), whose sum is σ = 1872005184. Its totient is φ = 618429840.

The previous prime is 1242431563. The next prime is 1242431579. The reversal of 1242431566 is 6651342421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242431563) 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, 1392415 + ... + 1393306.

It is an arithmetic number, because the mean of its divisors is an integer number (234000648).

Almost surely, 2^1242431566 is an apocalyptic number.

1242431566 is a deficient number, since it is larger than the sum of its proper divisors (629573618).

1242431566 is a wasteful number, since it uses less digits than its factorization.

1242431566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2785946.

The product of its digits is 34560, while the sum is 34.

The square root of 1242431566 is about 35248.1427312135. The cubic root of 1242431566 is about 1075.0388494343.

Adding to 1242431566 its reverse (6651342421), we get a palindrome (7893773987).

The spelling of 1242431566 in words is "one billion, two hundred forty-two million, four hundred thirty-one thousand, five hundred sixty-six".