12402140 has 24 divisors (see below), whose sum is σ = 26943840. Its totient is φ = 4789568.

The previous prime is 12402133. The next prime is 12402149. The reversal of 12402140 is 4120421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12402149) 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, 10112 + ... + 11271.

It is an arithmetic number, because the mean of its divisors is an integer number (1122660).

Almost surely, 2^12402140 is an apocalyptic number.

12402140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12402140 is an abundant number, since it is smaller than the sum of its proper divisors (14541700).

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

12402140 is a wasteful number, since it uses less digits than its factorization.

12402140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21421 (or 21419 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 12402140 is about 3521.6672188042. The cubic root of 12402140 is about 231.4722197958.

Adding to 12402140 its reverse (4120421), we get a palindrome (16522561).

The spelling of 12402140 in words is "twelve million, four hundred two thousand, one hundred forty".