12256999 has 8 divisors (see below), whose sum is σ = 12828672. Its totient is φ = 11688600.

The previous prime is 12256987. The next prime is 12257009. The reversal of 12256999 is 99965221.

12256999 = 387² + 388² + ... + 455².

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12256999 - 2⁹ = 12256487 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12256969) 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, 10074 + ... + 11224.

It is an arithmetic number, because the mean of its divisors is an integer number (1603584).

Almost surely, 2^12256999 is an apocalyptic number.

12256999 is a deficient number, since it is larger than the sum of its proper divisors (571673).

12256999 is a wasteful number, since it uses less digits than its factorization.

12256999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637.

The product of its digits is 87480, while the sum is 43.

The square root of 12256999 is about 3500.9997143673. Note that the first 3 decimals coincide. The cubic root of 12256999 is about 230.5657088887.

It can be divided in two parts, 122 and 56999, that added together give a square (57121 = 239²).

The spelling of 12256999 in words is "twelve million, two hundred fifty-six thousand, nine hundred ninety-nine".