1278660552 has 32 divisors (see below), whose sum is σ = 3442548480. Its totient is φ = 393433920.

The previous prime is 1278660527. The next prime is 1278660553. The reversal of 1278660552 is 2550668721.

It is not an unprimeable number, because it can be changed into a prime (1278660553) 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, 2048824 + ... + 2049447.

It is an arithmetic number, because the mean of its divisors is an integer number (107579640).

Almost surely, 2^1278660552 is an apocalyptic number.

1278660552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1278660552 is an abundant number, since it is smaller than the sum of its proper divisors (2163887928).

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

1278660552 is a wasteful number, since it uses less digits than its factorization.

1278660552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098293 (or 4098289 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 1278660552 is about 35758.3633853676. The cubic root of 1278660552 is about 1085.3881830741.

The spelling of 1278660552 in words is "one billion, two hundred seventy-eight million, six hundred sixty thousand, five hundred fifty-two".