12401553 has 8 divisors (see below), whose sum is σ = 16575328. Its totient is φ = 8247744.

The previous prime is 12401539. The next prime is 12401563. The reversal of 12401553 is 35510421.

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

It is not a de Polignac number, because 12401553 - 2⁴ = 12401537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12401533) 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, 3475 + ... + 6072.

It is an arithmetic number, because the mean of its divisors is an integer number (2071916).

Almost surely, 2^12401553 is an apocalyptic number.

It is an amenable number.

12401553 is a deficient number, since it is larger than the sum of its proper divisors (4173775).

12401553 is an equidigital number, since it uses as much as digits as its factorization.

12401553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9983.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 12401553 is about 3521.5838766101. The cubic root of 12401553 is about 231.4685678363.

Adding to 12401553 its reverse (35510421), we get a palindrome (47911974).

The spelling of 12401553 in words is "twelve million, four hundred one thousand, five hundred fifty-three".