1272530 has 40 divisors (see below), whose sum is σ = 2722572. Its totient is φ = 428064.

The previous prime is 1272461. The next prime is 1272539. The reversal of 1272530 is 352721.

It can be written as a sum of positive squares in 2 ways, for example, as 1270129 + 2401 = 1127^2 + 49^2 .

It is not an unprimeable number, because it can be changed into a prime (1272539) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 23984 + ... + 24036.

2^1272530 is an apocalyptic number.

1272530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1272530 is an abundant number, since it is smaller than the sum of its proper divisors (1450042).

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

1272530 is an frugal number, since it uses more digits than its factorization.

1272530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 1272530 is about 1128.0647144557. The cubic root of 1272530 is about 108.3650768253.

The spelling of 1272530 in words is "one million, two hundred seventy-two thousand, five hundred thirty".