1273918449 has 8 divisors (see below), whose sum is σ = 1726403392. Its totient is φ = 835356240.

The previous prime is 1273918439. The next prime is 1273918453. The reversal of 1273918449 is 9448193721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1273918449 - 2¹² = 1273914353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1273918398 and 1273918407.

It is not an unprimeable number, because it can be changed into a prime (1273918439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3480469 + ... + 3480834.

It is an arithmetic number, because the mean of its divisors is an integer number (215800424).

Almost surely, 2^1273918449 is an apocalyptic number.

It is an amenable number.

1273918449 is a deficient number, since it is larger than the sum of its proper divisors (452484943).

1273918449 is an equidigital number, since it uses as much as digits as its factorization.

1273918449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6961367.

The product of its digits is 435456, while the sum is 48.

The square root of 1273918449 is about 35691.9941863718. The cubic root of 1273918449 is about 1084.0447463748.

The spelling of 1273918449 in words is "one billion, two hundred seventy-three million, nine hundred eighteen thousand, four hundred forty-nine".