1266481152 has 72 divisors (see below), whose sum is σ = 3657883320. Its totient is φ = 422154240.

The previous prime is 1266481123. The next prime is 1266481169. The reversal of 1266481152 is 2511846621.

It is a happy number.

1266481152 is a `hidden beast` number, since 1 + 2 + 6 + 648 + 1 + 1 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15924 + ... + 52787.

It is an arithmetic number, because the mean of its divisors is an integer number (50803935).

Almost surely, 2^1266481152 is an apocalyptic number.

1266481152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1266481152 is an abundant number, since it is smaller than the sum of its proper divisors (2391402168).

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

1266481152 is an equidigital number, since it uses as much as digits as its factorization.

1266481152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68739 (or 68716 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 1266481152 is about 35587.6544886004. The cubic root of 1266481152 is about 1081.9310308720.

The spelling of 1266481152 in words is "one billion, two hundred sixty-six million, four hundred eighty-one thousand, one hundred fifty-two".