1266005042 has 8 divisors (see below), whose sum is σ = 1899183132. Its totient is φ = 632944000.

The previous prime is 1266005029. The next prime is 1266005051. The reversal of 1266005042 is 2405006621.

It can be written as a sum of positive squares in 2 ways, for example, as 947346841 + 318658201 = 30779^2 + 17851^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6542 + ... + 50742.

Almost surely, 2^1266005042 is an apocalyptic number.

1266005042 is a deficient number, since it is larger than the sum of its proper divisors (633178090).

1266005042 is a wasteful number, since it uses less digits than its factorization.

1266005042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58524.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1266005042 is about 35580.9646018767. The cubic root of 1266005042 is about 1081.7954366061.

The spelling of 1266005042 in words is "one billion, two hundred sixty-six million, five thousand, forty-two".