12880345 has 16 divisors (see below), whose sum is σ = 16653312. Its totient is φ = 9535680.

The previous prime is 12880337. The next prime is 12880393. The reversal of 12880345 is 54308821.

It is not a de Polignac number, because 12880345 - 2³ = 12880337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1759 + ... + 5371.

It is an arithmetic number, because the mean of its divisors is an integer number (1040832).

Almost surely, 2^12880345 is an apocalyptic number.

It is an amenable number.

12880345 is a deficient number, since it is larger than the sum of its proper divisors (3772967).

12880345 is a wasteful number, since it uses less digits than its factorization.

12880345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3672.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 12880345 is about 3588.9197539092. The cubic root of 12880345 is about 234.4098364811.

It can be divided in two parts, 12880 and 345, that added together give a square (13225 = 115²).

The spelling of 12880345 in words is "twelve million, eight hundred eighty thousand, three hundred forty-five".