102040442 has 16 divisors (see below), whose sum is σ = 178497600. Its totient is φ = 43731324.

The previous prime is 102040403. The next prime is 102040447. The reversal of 102040442 is 244040201.

It is a self number, because there is not a number n which added to its sum of digits gives 102040442.

It is not an unprimeable number, because it can be changed into a prime (102040447) 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, 73688 + ... + 75059.

It is an arithmetic number, because the mean of its divisors is an integer number (11156100).

Almost surely, 2^102040442 is an apocalyptic number.

102040442 is a deficient number, since it is larger than the sum of its proper divisors (76457158).

102040442 is an equidigital number, since it uses as much as digits as its factorization.

102040442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148770 (or 148756 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 102040442 is about 10101.5069172871. The cubic root of 102040442 is about 467.2946157605.

Adding to 102040442 its reverse (244040201), we get a palindrome (346080643).

The spelling of 102040442 in words is "one hundred two million, forty thousand, four hundred forty-two".