2178342 has 12 divisors (see below), whose sum is σ = 4719780. Its totient is φ = 726108.

The previous prime is 2178313. The next prime is 2178343. The reversal of 2178342 is 2438712.

It is a super-3 number, since 3×2178342³ = 31009834608200333064, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2178343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60492 + ... + 60527.

It is an arithmetic number, because the mean of its divisors is an integer number (393315).

2^2178342 is an apocalyptic number.

2178342 is an abundant number, since it is smaller than the sum of its proper divisors (2541438).

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

2178342 is a wasteful number, since it uses less digits than its factorization.

2178342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121027 (or 121024 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 2178342 is about 1475.9207295787. The cubic root of 2178342 is about 129.6309453996.

The spelling of 2178342 in words is "two million, one hundred seventy-eight thousand, three hundred forty-two".