12401571 has 16 divisors (see below), whose sum is σ = 20351744. Its totient is φ = 6541344.

The previous prime is 12401569. The next prime is 12401573. The reversal of 12401571 is 17510421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12401569) and next prime (12401573).

It is not a de Polignac number, because 12401571 - 2¹ = 12401569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (12401573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22441 + ... + 22986.

It is an arithmetic number, because the mean of its divisors is an integer number (1271984).

Almost surely, 2^12401571 is an apocalyptic number.

12401571 is a deficient number, since it is larger than the sum of its proper divisors (7950173).

12401571 is a wasteful number, since it uses less digits than its factorization.

12401571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45450.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 12401571 is about 3521.5864322774. The cubic root of 12401571 is about 231.4686798232.

Adding to 12401571 its reverse (17510421), we get a palindrome (29911992).

The spelling of 12401571 in words is "twelve million, four hundred one thousand, five hundred seventy-one".