12702240 has 72 divisors (see below), whose sum is σ = 43351308. Its totient is φ = 3386880.

The previous prime is 12702227. The next prime is 12702289. The reversal of 12702240 is 4220721.

It can be written as a sum of positive squares in 2 ways, for example, as 12702096 + 144 = 3564^2 + 12^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×12702240² = 322693802035200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2971 + ... + 5850.

Almost surely, 2^12702240 is an apocalyptic number.

12702240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12702240 is an abundant number, since it is smaller than the sum of its proper divisors (30649068).

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

12702240 is a wasteful number, since it uses less digits than its factorization.

12702240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8842 (or 8831 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 12702240 is about 3564.0202019629. The cubic root of 12702240 is about 233.3243715379.

Adding to 12702240 its reverse (4220721), we get a palindrome (16922961).

The spelling of 12702240 in words is "twelve million, seven hundred two thousand, two hundred forty".