2142155 has 8 divisors (see below), whose sum is σ = 2706000. Its totient is φ = 1623456.

The previous prime is 2142149. The next prime is 2142163. The reversal of 2142155 is 5512412.

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

It is a cyclic number.

It is not a de Polignac number, because 2142155 - 2⁸ = 2141899 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11180 + ... + 11369.

It is an arithmetic number, because the mean of its divisors is an integer number (338250).

2^2142155 is an apocalyptic number.

2142155 is a deficient number, since it is larger than the sum of its proper divisors (563845).

2142155 is a wasteful number, since it uses less digits than its factorization.

2142155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22573.

The product of its digits is 400, while the sum is 20.

The square root of 2142155 is about 1463.6102623308. The cubic root of 2142155 is about 128.9091161224.

Adding to 2142155 its reverse (5512412), we get a palindrome (7654567).

The spelling of 2142155 in words is "two million, one hundred forty-two thousand, one hundred fifty-five".