1275720478 has 16 divisors (see below), whose sum is σ = 1933914240. Its totient is φ = 631117656.

The previous prime is 1275720473. The next prime is 1275720491. The reversal of 1275720478 is 8740275721.

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 7 ways as a sum of consecutive naturals, for example, 65383 + ... + 82621.

It is an arithmetic number, because the mean of its divisors is an integer number (120869640).

Almost surely, 2^1275720478 is an apocalyptic number.

1275720478 is a deficient number, since it is larger than the sum of its proper divisors (658193762).

1275720478 is a wasteful number, since it uses less digits than its factorization.

1275720478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17631.

The product of its (nonzero) digits is 219520, while the sum is 43.

The square root of 1275720478 is about 35717.2294278266. The cubic root of 1275720478 is about 1084.5556528861. Note that the first 3 decimals are identical.

The spelling of 1275720478 in words is "one billion, two hundred seventy-five million, seven hundred twenty thousand, four hundred seventy-eight".