1272251530 has 16 divisors (see below), whose sum is σ = 2498239584. Its totient is φ = 462636880.

The previous prime is 1272251521. The next prime is 1272251537. The reversal of 1272251530 is 351522721.

It is not an unprimeable number, because it can be changed into a prime (1272251537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5782852 + ... + 5783071.

It is an arithmetic number, because the mean of its divisors is an integer number (156139974).

Almost surely, 2^1272251530 is an apocalyptic number.

1272251530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1272251530 is a deficient number, since it is larger than the sum of its proper divisors (1225988054).

1272251530 is a wasteful number, since it uses less digits than its factorization.

1272251530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11565941.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 1272251530 is about 35668.6351014445. The cubic root of 1272251530 is about 1083.5717167453.

The spelling of 1272251530 in words is "one billion, two hundred seventy-two million, two hundred fifty-one thousand, five hundred thirty".