1272500 has 30 divisors (see below), whose sum is σ = 2788170. Its totient is φ = 508000.

The previous prime is 1272461. The next prime is 1272539. The reversal of 1272500 is 52721.

It is an interprime number because it is at equal distance from previous prime (1272461) and next prime (1272539).

It can be written as a sum of positive squares in 5 ways, for example, as 300304 + 972196 = 548^2 + 986^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2246 + ... + 2754.

It is an arithmetic number, because the mean of its divisors is an integer number (92939).

2^1272500 is an apocalyptic number.

1272500 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 1272500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1394085).

1272500 is an abundant number, since it is smaller than the sum of its proper divisors (1515670).

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

1272500 is an equidigital number, since it uses as much as digits as its factorization.

1272500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 1272500 is about 1128.0514172678. The cubic root of 1272500 is about 108.3642252467.

The spelling of 1272500 in words is "one million, two hundred seventy-two thousand, five hundred".