12571440 has 120 divisors (see below), whose sum is σ = 45376560. Its totient is φ = 2870784.

The previous prime is 12571439. The next prime is 12571457. The reversal of 12571440 is 4417521.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×12571440² = 316082207347200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12571440.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11226 + ... + 12294.

It is an arithmetic number, because the mean of its divisors is an integer number (378138).

Almost surely, 2^12571440 is an apocalyptic number.

12571440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12571440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22688280).

12571440 is an abundant number, since it is smaller than the sum of its proper divisors (32805120).

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

12571440 is a wasteful number, since it uses less digits than its factorization.

12571440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099 (or 1086 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 12571440 is about 3545.6226533572. The cubic root of 12571440 is about 232.5207288721.

Adding to 12571440 its reverse (4417521), we get a palindrome (16988961).

The spelling of 12571440 in words is "twelve million, five hundred seventy-one thousand, four hundred forty".