2155242 has 8 divisors (see below), whose sum is σ = 4310496. Its totient is φ = 718412.

The previous prime is 2155207. The next prime is 2155253. The reversal of 2155242 is 2425512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

2155242 is an admirable number.

It is a congruent number.

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, 179598 + ... + 179609.

It is an arithmetic number, because the mean of its divisors is an integer number (538812).

2^2155242 is an apocalyptic number.

2155242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2155242 is a wasteful number, since it uses less digits than its factorization.

2155242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359212.

The product of its digits is 800, while the sum is 21.

The square root of 2155242 is about 1468.0742488035. The cubic root of 2155242 is about 129.1710968072.

The spelling of 2155242 in words is "two million, one hundred fifty-five thousand, two hundred forty-two".