12551398 has 4 divisors (see below), whose sum is σ = 18827100. Its totient is φ = 6275698.

The previous prime is 12551393. The next prime is 12551417. The reversal of 12551398 is 89315521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89315521 = 37 ⋅2413933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3137848 + ... + 3137851.

It is an arithmetic number, because the mean of its divisors is an integer number (4706775).

Almost surely, 2^12551398 is an apocalyptic number.

12551398 is a deficient number, since it is larger than the sum of its proper divisors (6275702).

12551398 is an equidigital number, since it uses as much as digits as its factorization.

12551398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6275701.

The product of its digits is 10800, while the sum is 34.

The square root of 12551398 is about 3542.7952241133. The cubic root of 12551398 is about 232.3970978710.

The spelling of 12551398 in words is "twelve million, five hundred fifty-one thousand, three hundred ninety-eight".