12051280 has 40 divisors (see below), whose sum is σ = 28326312. Its totient is φ = 4767744.

The previous prime is 12051239. The next prime is 12051293. The reversal of 12051280 is 8215021.

12051280 = T₂₅₁ + T₂₅₂ + ... + T₄₄₄.

It can be written as a sum of positive squares in 4 ways, for example, as 51984 + 11999296 = 228^2 + 3464^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6984 + ... + 8536.

Almost surely, 2^12051280 is an apocalyptic number.

12051280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12051280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14163156).

12051280 is an abundant number, since it is smaller than the sum of its proper divisors (16275032).

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

12051280 is a wasteful number, since it uses less digits than its factorization.

12051280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663 (or 1657 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 12051280 is about 3471.4953550307. The cubic root of 12051280 is about 229.2685014444.

It can be divided in two parts, 1205 and 1280, that added together give a triangular number (2485 = T₇₀).

The spelling of 12051280 in words is "twelve million, fifty-one thousand, two hundred eighty".