12401387 has 4 divisors (see below), whose sum is σ = 12611640. Its totient is φ = 12191136.

The previous prime is 12401369. The next prime is 12401399. The reversal of 12401387 is 78310421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78310421 = 7 ⋅11187203.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12401387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12401317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105038 + ... + 105155.

It is an arithmetic number, because the mean of its divisors is an integer number (3152910).

Almost surely, 2^12401387 is an apocalyptic number.

12401387 is a deficient number, since it is larger than the sum of its proper divisors (210253).

12401387 is an equidigital number, since it uses as much as digits as its factorization.

12401387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210252.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 12401387 is about 3521.5603075909. The cubic root of 12401387 is about 231.4675350637.

The spelling of 12401387 in words is "twelve million, four hundred one thousand, three hundred eighty-seven".