12531430 has 16 divisors (see below), whose sum is σ = 22790880. Its totient is φ = 4960512.

The previous prime is 12531391. The next prime is 12531437. The reversal of 12531430 is 3413521.

It is a junction number, because it is equal to n+sod(n) for n = 12531398 and 12531407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12531437) 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, 5490 + ... + 7429.

It is an arithmetic number, because the mean of its divisors is an integer number (1424430).

Almost surely, 2^12531430 is an apocalyptic number.

12531430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12531430 is a deficient number, since it is larger than the sum of its proper divisors (10259450).

12531430 is a wasteful number, since it uses less digits than its factorization.

12531430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13023.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 12531430 is about 3539.9759886191. The cubic root of 12531430 is about 232.2737923958.

Adding to 12531430 its reverse (3413521), we get a palindrome (15944951).

The spelling of 12531430 in words is "twelve million, five hundred thirty-one thousand, four hundred thirty".