1278945041 has 16 divisors (see below), whose sum is σ = 1413910080. Its totient is φ = 1147153920.

The previous prime is 1278945029. The next prime is 1278945047. The reversal of 1278945041 is 1405498721.

It is a de Polignac number, because none of the positive numbers 2^k-1278945041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1278945041.

It is not an unprimeable number, because it can be changed into a prime (1278945047) 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, 579446 + ... + 581648.

It is an arithmetic number, because the mean of its divisors is an integer number (88369380).

Almost surely, 2^1278945041 is an apocalyptic number.

1278945041 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1278945041 is a deficient number, since it is larger than the sum of its proper divisors (134965039).

1278945041 is a wasteful number, since it uses less digits than its factorization.

1278945041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2896.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 1278945041 is about 35762.3411006606. The cubic root of 1278945041 is about 1085.4686730579.

The spelling of 1278945041 in words is "one billion, two hundred seventy-eight million, nine hundred forty-five thousand, forty-one".