1275720479 has 16 divisors (see below), whose sum is σ = 1434723840. Its totient is φ = 1124429760.

The previous prime is 1275720473. The next prime is 1275720491. The reversal of 1275720479 is 9740275721.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1275720479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275720473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33914 + ... + 60840.

It is an arithmetic number, because the mean of its divisors is an integer number (89670240).

Almost surely, 2^1275720479 is an apocalyptic number.

1275720479 is a deficient number, since it is larger than the sum of its proper divisors (159003361).

1275720479 is a wasteful number, since it uses less digits than its factorization.

1275720479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27070.

The product of its (nonzero) digits is 246960, while the sum is 44.

The square root of 1275720479 is about 35717.2294418254. The cubic root of 1275720479 is about 1084.5556531694. Note that the first 3 decimals are identical.

The spelling of 1275720479 in words is "one billion, two hundred seventy-five million, seven hundred twenty thousand, four hundred seventy-nine".