1266505442 has 8 divisors (see below), whose sum is σ = 1982356416. Its totient is φ = 605719972.

The previous prime is 1266505441. The next prime is 1266505447. The reversal of 1266505442 is 2445056621.

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

It is not an unprimeable number, because it can be changed into a prime (1266505441) 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, 13766318 + ... + 13766409.

It is an arithmetic number, because the mean of its divisors is an integer number (247794552).

Almost surely, 2^1266505442 is an apocalyptic number.

1266505442 is a deficient number, since it is larger than the sum of its proper divisors (715850974).

1266505442 is a wasteful number, since it uses less digits than its factorization.

1266505442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27532752.

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 1266505442 is about 35587.9957569965. The cubic root of 1266505442 is about 1081.9379476579.

The spelling of 1266505442 in words is "one billion, two hundred sixty-six million, five hundred five thousand, four hundred forty-two".