1266155152 has 60 divisors (see below), whose sum is σ = 2579678640. Its totient is φ = 601969984.

The previous prime is 1266155147. The next prime is 1266155159. The reversal of 1266155152 is 2515516621.

It is a super-2 number, since 2×1266155152² = 3206297737872286208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1266155159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1920999 + ... + 1921657.

It is an arithmetic number, because the mean of its divisors is an integer number (42994644).

Almost surely, 2^1266155152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1266155152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1289839320).

1266155152 is an abundant number, since it is smaller than the sum of its proper divisors (1313523488).

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

1266155152 is a wasteful number, since it uses less digits than its factorization.

1266155152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940 (or 911 counting only the distinct ones).

The product of its digits is 18000, while the sum is 34.

The square root of 1266155152 is about 35583.0739537775. The cubic root of 1266155152 is about 1081.8381910160.

The spelling of 1266155152 in words is "one billion, two hundred sixty-six million, one hundred fifty-five thousand, one hundred fifty-two".