12520389 has 8 divisors (see below), whose sum is σ = 19078720. Its totient is φ = 7154496.

The previous prime is 12520379. The next prime is 12520399. The reversal of 12520389 is 98302521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12520379) and next prime (12520399).

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

It is not a de Polignac number, because 12520389 - 2¹⁶ = 12454853 is a prime.

It is a super-2 number, since 2×12520389² = 313520281422642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520309) 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, 298084 + ... + 298125.

It is an arithmetic number, because the mean of its divisors is an integer number (2384840).

Almost surely, 2^12520389 is an apocalyptic number.

It is an amenable number.

12520389 is a deficient number, since it is larger than the sum of its proper divisors (6558331).

12520389 is an equidigital number, since it uses as much as digits as its factorization.

12520389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596219.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 12520389 is about 3538.4161711139. The cubic root of 12520389 is about 232.2055562758.

The spelling of 12520389 in words is "twelve million, five hundred twenty thousand, three hundred eighty-nine".