205442142 has 16 divisors (see below), whose sum is σ = 411747840. Its totient is φ = 68336792.

The previous prime is 205442099. The next prime is 205442143. The reversal of 205442142 is 241244502.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205442143) 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, 32868 + ... + 38615.

It is an arithmetic number, because the mean of its divisors is an integer number (25734240).

Almost surely, 2^205442142 is an apocalyptic number.

205442142 is an abundant number, since it is smaller than the sum of its proper divisors (206305698).

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

205442142 is a wasteful number, since it uses less digits than its factorization.

205442142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71967.

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 205442142 is about 14333.2530152788. The cubic root of 205442142 is about 590.0604572731.

Adding to 205442142 its reverse (241244502), we get a palindrome (446686644).

The spelling of 205442142 in words is "two hundred five million, four hundred forty-two thousand, one hundred forty-two".