1278152560 has 20 divisors (see below), whose sum is σ = 2971704888. Its totient is φ = 511260992.

The previous prime is 1278152521. The next prime is 1278152567. The reversal of 1278152560 is 652518721.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278152567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7988374 + ... + 7988533.

Almost surely, 2^1278152560 is an apocalyptic number.

1278152560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1278152560 is an abundant number, since it is smaller than the sum of its proper divisors (1693552328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1278152560 is a wasteful number, since it uses less digits than its factorization.

1278152560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15976920 (or 15976914 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 1278152560 is about 35751.2595582310. The cubic root of 1278152560 is about 1085.2444280731.

It can be divided in two parts, 12781 and 52560, that added together give a triangular number (65341 = T₃₆₁).

The spelling of 1278152560 in words is "one billion, two hundred seventy-eight million, one hundred fifty-two thousand, five hundred sixty".