1266526530 has 80 divisors (see below), whose sum is σ = 3461512824. Its totient is φ = 332190720.

The previous prime is 1266526501. The next prime is 1266526553. The reversal of 1266526530 is 356256621.

It is a happy number.

1266526530 is a `hidden beast` number, since 12 + 66 + 52 + 6 + 530 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 564965361 + 701561169 = 23769^2 + 26487^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 36594 + ... + 62226.

Almost surely, 2^1266526530 is an apocalyptic number.

1266526530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1266526530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1730756412).

1266526530 is an abundant number, since it is smaller than the sum of its proper divisors (2194986294).

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

1266526530 is a wasteful number, since it uses less digits than its factorization.

1266526530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25713 (or 25704 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 1266526530 is about 35588.2920354433. The cubic root of 1266526530 is about 1081.9439525751.

The spelling of 1266526530 in words is "one billion, two hundred sixty-six million, five hundred twenty-six thousand, five hundred thirty".