1266555452 has 12 divisors (see below), whose sum is σ = 2222057880. Its totient is φ = 631681776.

The previous prime is 1266555449. The next prime is 1266555517. The reversal of 1266555452 is 2545556621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397202 + ... + 400377.

It is an arithmetic number, because the mean of its divisors is an integer number (185171490).

Almost surely, 2^1266555452 is an apocalyptic number.

It is an amenable number.

1266555452 is a deficient number, since it is larger than the sum of its proper divisors (955502428).

1266555452 is a wasteful number, since it uses less digits than its factorization.

1266555452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797980 (or 797978 counting only the distinct ones).

The product of its digits is 360000, while the sum is 41.

The square root of 1266555452 is about 35588.6983746245. The cubic root of 1266555452 is about 1081.9521881559.

The spelling of 1266555452 in words is "one billion, two hundred sixty-six million, five hundred fifty-five thousand, four hundred fifty-two".