102000442 has 16 divisors (see below), whose sum is σ = 162252072. Its totient is φ = 47925760.

The previous prime is 102000433. The next prime is 102000449. The reversal of 102000442 is 244000201.

It can be written as a sum of positive squares in 4 ways, for example, as 83156161 + 18844281 = 9119^2 + 4341^2 .

102000442 is a modest number, since divided by 442 gives 102 as remainder.

It is not an unprimeable number, because it can be changed into a prime (102000449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24342 + ... + 28222.

Almost surely, 2^102000442 is an apocalyptic number.

102000442 is a deficient number, since it is larger than the sum of its proper divisors (60251630).

102000442 is a wasteful number, since it uses less digits than its factorization.

102000442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4673.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 102000442 is about 10099.5268205991. The cubic root of 102000442 is about 467.2335477265.

Adding to 102000442 its reverse (244000201), we get a palindrome (346000643).

The spelling of 102000442 in words is "one hundred two million, four hundred forty-two", and thus it is an aban number.