1273055545 has 4 divisors (see below), whose sum is σ = 1527666660. Its totient is φ = 1018444432.

The previous prime is 1273055501. The next prime is 1273055551. The reversal of 1273055545 is 5455503721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 767345401 + 505710144 = 27701^2 + 22488^2 .

It is a cyclic number.

It is not a de Polignac number, because 1273055545 - 2⁷ = 1273055417 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127305550 + ... + 127305559.

It is an arithmetic number, because the mean of its divisors is an integer number (381916665).

Almost surely, 2^1273055545 is an apocalyptic number.

It is an amenable number.

1273055545 is a deficient number, since it is larger than the sum of its proper divisors (254611115).

1273055545 is an equidigital number, since it uses as much as digits as its factorization.

1273055545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254611114.

The product of its (nonzero) digits is 105000, while the sum is 37.

The square root of 1273055545 is about 35679.9039376510. The cubic root of 1273055545 is about 1083.7999275024.

The spelling of 1273055545 in words is "one billion, two hundred seventy-three million, fifty-five thousand, five hundred forty-five".