215142 has 16 divisors (see below), whose sum is σ = 449280. Its totient is φ = 68552.

The previous prime is 215141. The next prime is 215143. The reversal of 215142 is 241512.

It is an interprime number because it is at equal distance from previous prime (215141) and next prime (215143).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 215142.

It is not an unprimeable number, because it can be changed into a prime (215141) 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, 642 + ... + 917.

It is an arithmetic number, because the mean of its divisors is an integer number (28080).

2²¹⁵¹⁴² is an apocalyptic number.

215142 is an abundant number, since it is smaller than the sum of its proper divisors (234138).

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

215142 is a wasteful number, since it uses less digits than its factorization.

215142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587.

The product of its digits is 80, while the sum is 15.

The square root of 215142 is about 463.8340220381. The cubic root of 215142 is about 59.9204501325.

Adding to 215142 its reverse (241512), we get a palindrome (456654).

The spelling of 215142 in words is "two hundred fifteen thousand, one hundred forty-two".