102142444 has 6 divisors (see below), whose sum is σ = 178749284. Its totient is φ = 51071220.

The previous prime is 102142441. The next prime is 102142493. The reversal of 102142444 is 444241201.

It is not an unprimeable number, because it can be changed into a prime (102142441) 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 as a sum of consecutive naturals, namely, 12767802 + ... + 12767809.

Almost surely, 2^102142444 is an apocalyptic number.

It is an amenable number.

102142444 is a deficient number, since it is larger than the sum of its proper divisors (76606840).

102142444 is a wasteful number, since it uses less digits than its factorization.

102142444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25535615 (or 25535613 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 102142444 is about 10106.5545068535. The cubic root of 102142444 is about 467.4502700970.

Adding to 102142444 its reverse (444241201), we get a palindrome (546383645).

The spelling of 102142444 in words is "one hundred two million, one hundred forty-two thousand, four hundred forty-four".