1286128172 has 24 divisors (see below), whose sum is σ = 2578010400. Its totient is φ = 549964800.

The previous prime is 1286128133. The next prime is 1286128187. The reversal of 1286128172 is 2718216821.

It is a super-3 number, since 3×1286128172³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38579 + ... + 63722.

It is an arithmetic number, because the mean of its divisors is an integer number (107417100).

Almost surely, 2^1286128172 is an apocalyptic number.

It is an amenable number.

1286128172 is an abundant number, since it is smaller than the sum of its proper divisors (1291882228).

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

1286128172 is a wasteful number, since it uses less digits than its factorization.

1286128172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102761 (or 102759 counting only the distinct ones).

The product of its digits is 21504, while the sum is 38.

The square root of 1286128172 is about 35862.6291841521. The cubic root of 1286128172 is about 1087.4970405874.

The spelling of 1286128172 in words is "one billion, two hundred eighty-six million, one hundred twenty-eight thousand, one hundred seventy-two".