1349272921 has 2 divisors, whose sum is σ = 1349272922. Its totient is φ = 1349272920.

The previous prime is 1349272907. The next prime is 1349273027. The reversal of 1349272921 is 1292729431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1271920896 + 77352025 = 35664^2 + 8795^2 .

It is a cyclic number.

It is not a de Polignac number, because 1349272921 - 2⁹ = 1349272409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1349272721) 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 as a sum of consecutive naturals, namely, 674636460 + 674636461.

It is an arithmetic number, because the mean of its divisors is an integer number (674636461).

Almost surely, 2^1349272921 is an apocalyptic number.

It is an amenable number.

1349272921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1349272921 is an equidigital number, since it uses as much as digits as its factorization.

1349272921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 1349272921 is about 36732.4505172198. The cubic root of 1349272921 is about 1105.0110004843.

The spelling of 1349272921 in words is "one billion, three hundred forty-nine million, two hundred seventy-two thousand, nine hundred twenty-one".