1273847401 has 2 divisors, whose sum is σ = 1273847402. Its totient is φ = 1273847400.

The previous prime is 1273847389. The next prime is 1273847413. The reversal of 1273847401 is 1047483721.

It is a balanced prime because it is at equal distance from previous prime (1273847389) and next prime (1273847413).

It can be written as a sum of positive squares in only one way, i.e., 1137308176 + 136539225 = 33724^2 + 11685^2 .

It is an emirp because it is prime and its reverse (1047483721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1273847401 - 2⁵ = 1273847369 is a prime.

It is not a weakly prime, because it can be changed into another prime (1273847441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636923700 + 636923701.

It is an arithmetic number, because the mean of its divisors is an integer number (636923701).

Almost surely, 2^1273847401 is an apocalyptic number.

It is an amenable number.

1273847401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1273847401 is an equidigital number, since it uses as much as digits as its factorization.

1273847401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 1273847401 is about 35690.9988792693. The cubic root of 1273847401 is about 1084.0245931635.

It can be divided in two parts, 127384740 and 1, that added together give a triangular number (127384741 = T₁₅₉₆₁).

The spelling of 1273847401 in words is "one billion, two hundred seventy-three million, eight hundred forty-seven thousand, four hundred one".