12401531 has 8 divisors (see below), whose sum is σ = 13387680. Its totient is φ = 11452672.

The previous prime is 12401507. The next prime is 12401533. The reversal of 12401531 is 13510421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12401531 is a prime.

It is a super-2 number, since 2×12401531² = 307595942287922, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (12401533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8630 + ... + 9963.

It is an arithmetic number, because the mean of its divisors is an integer number (1673460).

Almost surely, 2^12401531 is an apocalyptic number.

12401531 is a deficient number, since it is larger than the sum of its proper divisors (986149).

12401531 is a wasteful number, since it uses less digits than its factorization.

12401531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18645.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 12401531 is about 3521.5807530142. The cubic root of 12401531 is about 231.4684309634.

Adding to 12401531 its reverse (13510421), we get a palindrome (25911952).

The spelling of 12401531 in words is "twelve million, four hundred one thousand, five hundred thirty-one".