1266896539 has 8 divisors (see below), whose sum is σ = 1307311568. Its totient is φ = 1226806560.

The previous prime is 1266896513. The next prime is 1266896563. The reversal of 1266896539 is 9356986621.

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

It is a cyclic number.

It is not a de Polignac number, because 1266896539 - 2¹³ = 1266888347 is a prime.

It is a super-5 number, since 5×1266896539⁵ (a number of 47 digits) contains 55555 as substring. Note that it is a super-d number also for d = 4.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1266896539.

It is not an unprimeable number, because it can be changed into a prime (1266896509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73332 + ... + 88945.

It is an arithmetic number, because the mean of its divisors is an integer number (163413946).

Almost surely, 2^1266896539 is an apocalyptic number.

1266896539 is a deficient number, since it is larger than the sum of its proper divisors (40415029).

1266896539 is a wasteful number, since it uses less digits than its factorization.

1266896539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162525.

The product of its digits is 4199040, while the sum is 55.

The square root of 1266896539 is about 35593.4901210882. The cubic root of 1266896539 is about 1082.0493037099.

The spelling of 1266896539 in words is "one billion, two hundred sixty-six million, eight hundred ninety-six thousand, five hundred thirty-nine".