1242946566 has 32 divisors (see below), whose sum is σ = 2814225120. Its totient is φ = 406497312.

The previous prime is 1242946559. The next prime is 1242946567. The reversal of 1242946566 is 6656492421.

1242946566 is a `hidden beast` number, since 1 + 2 + 42 + 9 + 46 + 566 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242946567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214285 + ... + 220008.

It is an arithmetic number, because the mean of its divisors is an integer number (87944535).

Almost surely, 2^1242946566 is an apocalyptic number.

1242946566 is an abundant number, since it is smaller than the sum of its proper divisors (1571278554).

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

1242946566 is a wasteful number, since it uses less digits than its factorization.

1242946566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434357 (or 434351 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 1242946566 is about 35255.4473237825. The cubic root of 1242946566 is about 1075.1873669444.

The spelling of 1242946566 in words is "one billion, two hundred forty-two million, nine hundred forty-six thousand, five hundred sixty-six".