1273945347 has 12 divisors (see below), whose sum is σ = 1887601240. Its totient is φ = 849173256.

The previous prime is 1273945331. The next prime is 1273945363. The reversal of 1273945347 is 7435493721.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

1273945347 is a `hidden beast` number, since 1 + 27 + 3 + 94 + 534 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (1273945331) and next prime (1273945363).

It is not a de Polignac number, because 1273945347 - 2⁴ = 1273945331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1273945397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182029 + ... + 188897.

Almost surely, 2^1273945347 is an apocalyptic number.

1273945347 is a deficient number, since it is larger than the sum of its proper divisors (613655893).

1273945347 is an frugal number, since it uses more digits than its factorization.

1273945347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13747 (or 6872 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 1273945347 is about 35692.3709915719. The cubic root of 1273945347 is about 1084.0523759659.

The spelling of 1273945347 in words is "one billion, two hundred seventy-three million, nine hundred forty-five thousand, three hundred forty-seven".