1273642245 has 32 divisors (see below), whose sum is σ = 2319488640. Its totient is φ = 662705280.

The previous prime is 1273642229. The next prime is 1273642259. The reversal of 1273642245 is 5422463721.

1273642245 is a `hidden beast` number, since 1 + 2 + 7 + 3 + 642 + 2 + 4 + 5 = 666.

1273642245 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1273642245 - 2⁴ = 1273642229 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109519 + ... + 120588.

It is an arithmetic number, because the mean of its divisors is an integer number (72484020).

Almost surely, 2^1273642245 is an apocalyptic number.

1273642245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1273642245 is a deficient number, since it is larger than the sum of its proper divisors (1045846395).

1273642245 is a wasteful number, since it uses less digits than its factorization.

1273642245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230162 (or 230156 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 1273642245 is about 35688.1247055656. The cubic root of 1273642245 is about 1083.9663951697.

The spelling of 1273642245 in words is "one billion, two hundred seventy-three million, six hundred forty-two thousand, two hundred forty-five".