1268543100 has 72 divisors (see below), whose sum is σ = 4003993728. Its totient is φ = 307524800.

The previous prime is 1268543083. The next prime is 1268543149. The reversal of 1268543100 is 13458621.

1268543100 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1268543100² = 3218403193115220000, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188904 + ... + 195503.

It is an arithmetic number, because the mean of its divisors is an integer number (55611024).

Almost surely, 2^1268543100 is an apocalyptic number.

1268543100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1268543100 is an abundant number, since it is smaller than the sum of its proper divisors (2735450628).

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

1268543100 is a wasteful number, since it uses less digits than its factorization.

1268543100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384435 (or 384428 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1268543100 is about 35616.6126968863. The cubic root of 1268543100 is about 1082.5178736424.

The spelling of 1268543100 in words is "one billion, two hundred sixty-eight million, five hundred forty-three thousand, one hundred".