1261233300 has 144 divisors (see below), whose sum is σ = 3857739200. Its totient is φ = 317260800.

The previous prime is 1261233227. The next prime is 1261233331. The reversal of 1261233300 is 33321621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2331030 + ... + 2331570.

Almost surely, 2^1261233300 is an apocalyptic number.

1261233300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1261233300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1928869600).

1261233300 is an abundant number, since it is smaller than the sum of its proper divisors (2596505900).

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

1261233300 is a wasteful number, since it uses less digits than its factorization.

1261233300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1261233300 is about 35513.8465953774. The cubic root of 1261233300 is about 1080.4345816209.

Adding to 1261233300 its reverse (33321621), we get a palindrome (1294554921).

The spelling of 1261233300 in words is "one billion, two hundred sixty-one million, two hundred thirty-three thousand, three hundred".