1272250321 has 2 divisors, whose sum is σ = 1272250322. Its totient is φ = 1272250320.

The previous prime is 1272250249. The next prime is 1272250333. The reversal of 1272250321 is 1230522721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1229203600 + 43046721 = 35060^2 + 6561^2 .

It is an emirp because it is prime and its reverse (1230522721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1272250321 - 2⁷ = 1272250193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1272250361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636125160 + 636125161.

It is an arithmetic number, because the mean of its divisors is an integer number (636125161).

Almost surely, 2^1272250321 is an apocalyptic number.

It is an amenable number.

1272250321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272250321 is an equidigital number, since it uses as much as digits as its factorization.

1272250321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1272250321 is about 35668.6181537777. The cubic root of 1272250321 is about 1083.5713735116.

The spelling of 1272250321 in words is "one billion, two hundred seventy-two million, two hundred fifty thousand, three hundred twenty-one".