1266235500 has 48 divisors (see below), whose sum is σ = 3687282144. Its totient is φ = 337662400.

The previous prime is 1266235493. The next prime is 1266235543. The reversal of 1266235500 is 55326621.

1266235500 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×1266235500⁴ (a number of 38 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420579 + ... + 423578.

It is an arithmetic number, because the mean of its divisors is an integer number (76818378).

Almost surely, 2^1266235500 is an apocalyptic number.

1266235500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1266235500 is an abundant number, since it is smaller than the sum of its proper divisors (2421046644).

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

1266235500 is a wasteful number, since it uses less digits than its factorization.

1266235500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844179 (or 844167 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 1266235500 is about 35584.2029558061. The cubic root of 1266235500 is about 1081.8610743875.

The spelling of 1266235500 in words is "one billion, two hundred sixty-six million, two hundred thirty-five thousand, five hundred".