12581445 has 16 divisors (see below), whose sum is σ = 21314880. Its totient is φ = 6315264.

The previous prime is 12581441. The next prime is 12581449. The reversal of 12581445 is 54418521.

It is an interprime number because it is at equal distance from previous prime (12581441) and next prime (12581449).

It is not a de Polignac number, because 12581445 - 2² = 12581441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12581441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24415 + ... + 24924.

It is an arithmetic number, because the mean of its divisors is an integer number (1332180).

Almost surely, 2^12581445 is an apocalyptic number.

12581445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12581445 is a deficient number, since it is larger than the sum of its proper divisors (8733435).

12581445 is a wasteful number, since it uses less digits than its factorization.

12581445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49364.

The product of its digits is 6400, while the sum is 30.

The square root of 12581445 is about 3547.0332673940. The cubic root of 12581445 is about 232.5823965097.

Adding to 12581445 its reverse (54418521), we get a palindrome (66999966).

The spelling of 12581445 in words is "twelve million, five hundred eighty-one thousand, four hundred forty-five".