12251559 has 4 divisors (see below), whose sum is σ = 16335416. Its totient is φ = 8167704.

The previous prime is 12251549. The next prime is 12251567. The reversal of 12251559 is 95515221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12251559 - 2⁹ = 12251047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12251549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2041924 + ... + 2041929.

It is an arithmetic number, because the mean of its divisors is an integer number (4083854).

Almost surely, 2^12251559 is an apocalyptic number.

12251559 is a deficient number, since it is larger than the sum of its proper divisors (4083857).

12251559 is an equidigital number, since it uses as much as digits as its factorization.

12251559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4083856.

The product of its digits is 4500, while the sum is 30.

The square root of 12251559 is about 3500.2227072002. Note that the first 3 decimals coincide. The cubic root of 12251559 is about 230.5315933312.

It can be divided in two parts, 122 and 51559, that added together give a triangular number (51681 = T₃₂₁).

The spelling of 12251559 in words is "twelve million, two hundred fifty-one thousand, five hundred fifty-nine".