102425442 has 64 divisors (see below), whose sum is σ = 249661440. Its totient is φ = 27346176.

The previous prime is 102425423. The next prime is 102425471. The reversal of 102425442 is 244524201.

It is a happy number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 118809 + ... + 119667.

It is an arithmetic number, because the mean of its divisors is an integer number (3900960).

Almost surely, 2^102425442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102425442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124830720).

102425442 is an abundant number, since it is smaller than the sum of its proper divisors (147235998).

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

102425442 is a wasteful number, since it uses less digits than its factorization.

102425442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055.

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

The square root of 102425442 is about 10120.5455386555. The cubic root of 102425442 is about 467.8815811865.

Adding to 102425442 its reverse (244524201), we get a palindrome (346949643).

The spelling of 102425442 in words is "one hundred two million, four hundred twenty-five thousand, four hundred forty-two".