12491541 has 12 divisors (see below), whose sum is σ = 18291468. Its totient is φ = 8213184.

The previous prime is 12491537. The next prime is 12491581. The reversal of 12491541 is 14519421.

It can be written as a sum of positive squares in 2 ways, for example, as 2187441 + 10304100 = 1479^2 + 3210^2 .

It is not a de Polignac number, because 12491541 - 2² = 12491537 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12491581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8850 + ... + 10163.

It is an arithmetic number, because the mean of its divisors is an integer number (1524289).

Almost surely, 2^12491541 is an apocalyptic number.

It is an amenable number.

12491541 is a deficient number, since it is larger than the sum of its proper divisors (5799927).

12491541 is a wasteful number, since it uses less digits than its factorization.

12491541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19092 (or 19089 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 12491541 is about 3534.3374202246. The cubic root of 12491541 is about 232.0270789340.

The spelling of 12491541 in words is "twelve million, four hundred ninety-one thousand, five hundred forty-one".