1273435655 has 4 divisors (see below), whose sum is σ = 1528122792. Its totient is φ = 1018748520.

The previous prime is 1273435649. The next prime is 1273435703. The reversal of 1273435655 is 5565343721.

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

It is not a de Polignac number, because 1273435655 - 2²⁶ = 1206326791 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 127343561 + ... + 127343570.

It is an arithmetic number, because the mean of its divisors is an integer number (382030698).

Almost surely, 2^1273435655 is an apocalyptic number.

1273435655 is a deficient number, since it is larger than the sum of its proper divisors (254687137).

1273435655 is an equidigital number, since it uses as much as digits as its factorization.

1273435655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254687136.

The product of its digits is 378000, while the sum is 41.

The square root of 1273435655 is about 35685.2302080286. The cubic root of 1273435655 is about 1083.9077840677.

The spelling of 1273435655 in words is "one billion, two hundred seventy-three million, four hundred thirty-five thousand, six hundred fifty-five".