12401540 has 24 divisors (see below), whose sum is σ = 26127360. Its totient is φ = 4944608.

The previous prime is 12401539. The next prime is 12401563. The reversal of 12401540 is 4510421.

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, 6851 + ... + 8469.

It is an arithmetic number, because the mean of its divisors is an integer number (1088640).

Almost surely, 2^12401540 is an apocalyptic number.

12401540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12401540 is an abundant number, since it is smaller than the sum of its proper divisors (13725820).

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

12401540 is a wasteful number, since it uses less digits than its factorization.

12401540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011 (or 2009 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12401540 is about 3521.5820308492. The cubic root of 12401540 is about 231.4684869569.

Adding to 12401540 its reverse (4510421), we get a palindrome (16911961).

The spelling of 12401540 in words is "twelve million, four hundred one thousand, five hundred forty".