12642340 has 12 divisors (see below), whose sum is σ = 26548956. Its totient is φ = 5056928.

The previous prime is 12642337. The next prime is 12642367. The reversal of 12642340 is 4324621.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9572836 + 3069504 = 3094^2 + 1752^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316039 + ... + 316078.

It is an arithmetic number, because the mean of its divisors is an integer number (2212413).

Almost surely, 2^12642340 is an apocalyptic number.

12642340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12642340 is an abundant number, since it is smaller than the sum of its proper divisors (13906616).

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

12642340 is a wasteful number, since it uses less digits than its factorization.

12642340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632126 (or 632124 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 12642340 is about 3555.6068399079. The cubic root of 12642340 is about 232.9570306414.

Adding to 12642340 its reverse (4324621), we get a palindrome (16966961).

The spelling of 12642340 in words is "twelve million, six hundred forty-two thousand, three hundred forty".