12540261 has 8 divisors (see below), whose sum is σ = 16886304. Its totient is φ = 8277200.

The previous prime is 12540259. The next prime is 12540263. The reversal of 12540261 is 16204521.

It is an interprime number because it is at equal distance from previous prime (12540259) and next prime (12540263).

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

It is a cyclic number.

It is not a de Polignac number, because 12540261 - 2¹ = 12540259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12540263) 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, 20391 + ... + 20996.

It is an arithmetic number, because the mean of its divisors is an integer number (2110788).

Almost surely, 2^12540261 is an apocalyptic number.

It is an amenable number.

12540261 is a deficient number, since it is larger than the sum of its proper divisors (4346043).

12540261 is a wasteful number, since it uses less digits than its factorization.

12540261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41491.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 12540261 is about 3541.2230937912. The cubic root of 12540261 is about 232.3283413237.

Adding to 12540261 its reverse (16204521), we get a palindrome (28744782).

The spelling of 12540261 in words is "twelve million, five hundred forty thousand, two hundred sixty-one".