1278848131 has 16 divisors (see below), whose sum is σ = 1438917120. Its totient is φ = 1126349280.

The previous prime is 1278848111. The next prime is 1278848149. The reversal of 1278848131 is 1318488721.

It is a cyclic number.

It is not a de Polignac number, because 1278848131 - 2²³ = 1270459523 is a prime.

It is a super-2 number, since 2×1278848131² = 3270905084324386322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1278848111) 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, 90700 + ... + 103846.

It is an arithmetic number, because the mean of its divisors is an integer number (89932320).

Almost surely, 2^1278848131 is an apocalyptic number.

1278848131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1278848131 is a deficient number, since it is larger than the sum of its proper divisors (160068989).

1278848131 is a wasteful number, since it uses less digits than its factorization.

1278848131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13434.

The product of its digits is 86016, while the sum is 43.

The square root of 1278848131 is about 35760.9861581025. The cubic root of 1278848131 is about 1085.4412558188.

The spelling of 1278848131 in words is "one billion, two hundred seventy-eight million, eight hundred forty-eight thousand, one hundred thirty-one".