1281872078 has 16 divisors (see below), whose sum is σ = 1964983104. Its totient is φ = 626895360.

The previous prime is 1281872077. The next prime is 1281872159. The reversal of 1281872078 is 8702781821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281872071) 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, 186218 + ... + 192978.

It is an arithmetic number, because the mean of its divisors is an integer number (122811444).

Almost surely, 2^1281872078 is an apocalyptic number.

1281872078 is a deficient number, since it is larger than the sum of its proper divisors (683111026).

1281872078 is a wasteful number, since it uses less digits than its factorization.

1281872078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8827.

The product of its (nonzero) digits is 100352, while the sum is 44.

The square root of 1281872078 is about 35803.2411661291. The cubic root of 1281872078 is about 1086.2961222765.

The spelling of 1281872078 in words is "one billion, two hundred eighty-one million, eight hundred seventy-two thousand, seventy-eight".