142102642 has 12 divisors (see below), whose sum is σ = 234293598. Its totient is φ = 64592000.

The previous prime is 142102633. The next prime is 142102669. The reversal of 142102642 is 246201241.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 106688241 + 35414401 = 10329^2 + 5951^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 293359 + ... + 293842.

Almost surely, 2^142102642 is an apocalyptic number.

142102642 is a deficient number, since it is larger than the sum of its proper divisors (92190956).

142102642 is a wasteful number, since it uses less digits than its factorization.

142102642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587225 (or 587214 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 142102642 is about 11920.6812724777. The cubic root of 142102642 is about 521.8360171534.

Adding to 142102642 its reverse (246201241), we get a palindrome (388303883).

The spelling of 142102642 in words is "one hundred forty-two million, one hundred two thousand, six hundred forty-two".