1272142300 has 144 divisors (see below), whose sum is σ = 3434592672. Its totient is φ = 401817600.

The previous prime is 1272142297. The next prime is 1272142307. The reversal of 1272142300 is 32412721.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272142307) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 240484 + ... + 245716.

It is an arithmetic number, because the mean of its divisors is an integer number (23851338).

Almost surely, 2^1272142300 is an apocalyptic number.

1272142300 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 1272142300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1717296336).

1272142300 is an abundant number, since it is smaller than the sum of its proper divisors (2162450372).

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

1272142300 is a wasteful number, since it uses less digits than its factorization.

1272142300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5288 (or 5281 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 1272142300 is about 35667.1038914011. The cubic root of 1272142300 is about 1083.5407056013.

The spelling of 1272142300 in words is "one billion, two hundred seventy-two million, one hundred forty-two thousand, three hundred".