12523400 has 24 divisors (see below), whose sum is σ = 29117370. Its totient is φ = 5009280.

The previous prime is 12523393. The next prime is 12523417. The reversal of 12523400 is 432521.

12523400 = T₂₂ + T₂₃ + ... + T₄₂₁.

It can be written as a sum of positive squares in 3 ways, for example, as 5373124 + 7150276 = 2318^2 + 2674^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31109 + ... + 31508.

Almost surely, 2^12523400 is an apocalyptic number.

12523400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12523400 is an abundant number, since it is smaller than the sum of its proper divisors (16593970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12523400 is a wasteful number, since it uses less digits than its factorization.

12523400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62633 (or 62624 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 12523400 is about 3538.8416183831. The cubic root of 12523400 is about 232.2241689799.

Adding to 12523400 its reverse (432521), we get a palindrome (12955921).

The spelling of 12523400 in words is "twelve million, five hundred twenty-three thousand, four hundred".