12645040 has 40 divisors (see below), whose sum is σ = 29560608. Its totient is φ = 5030400.

The previous prime is 12645011. The next prime is 12645041. The reversal of 12645040 is 4054621.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12645041) 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, 20740 + ... + 21340.

Almost surely, 2^12645040 is an apocalyptic number.

12645040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12645040 is an abundant number, since it is smaller than the sum of its proper divisors (16915568).

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

12645040 is a wasteful number, since it uses less digits than its factorization.

12645040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877 (or 871 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 12645040 is about 3555.9865016617. The cubic root of 12645040 is about 232.9736135211.

Adding to 12645040 its reverse (4054621), we get a palindrome (16699661).

The spelling of 12645040 in words is "twelve million, six hundred forty-five thousand, forty".