12398445 has 12 divisors (see below), whose sum is σ = 21490716. Its totient is φ = 6612480.

The previous prime is 12398429. The next prime is 12398467. The reversal of 12398445 is 54489321.

12398445 is a `hidden beast` number, since 123 + 98 + 445 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7322436 + 5076009 = 2706^2 + 2253^2 .

It is not a de Polignac number, because 12398445 - 2⁴ = 12398429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137716 + ... + 137805.

It is an arithmetic number, because the mean of its divisors is an integer number (1790893).

Almost surely, 2^12398445 is an apocalyptic number.

12398445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12398445 is a deficient number, since it is larger than the sum of its proper divisors (9092271).

12398445 is a wasteful number, since it uses less digits than its factorization.

12398445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275532 (or 275529 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 12398445 is about 3521.1425702462. The cubic root of 12398445 is about 231.4492298170.

The spelling of 12398445 in words is "twelve million, three hundred ninety-eight thousand, four hundred forty-five".