12540232 has 32 divisors (see below), whose sum is σ = 24175800. Its totient is φ = 6096384.

The previous prime is 12540217. The next prime is 12540259. The reversal of 12540232 is 23204521.

It can be written as a sum of positive squares in 4 ways, for example, as 12489156 + 51076 = 3534^2 + 226^2 .

It is a super-2 number, since 2×12540232² = 314514837227648, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 63558 + ... + 63754.

Almost surely, 2^12540232 is an apocalyptic number.

It is an amenable number.

12540232 is a deficient number, since it is larger than the sum of its proper divisors (11635568).

12540232 is a wasteful number, since it uses less digits than its factorization.

12540232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 12540232 is about 3541.2189991583. The cubic root of 12540232 is about 232.3281622331.

Adding to 12540232 its reverse (23204521), we get a palindrome (35744753).

The spelling of 12540232 in words is "twelve million, five hundred forty thousand, two hundred thirty-two".