102120442 has 16 divisors (see below), whose sum is σ = 157588992. Its totient is φ = 49603680.

The previous prime is 102120433. The next prime is 102120443. The reversal of 102120442 is 244021201.

It is not an unprimeable number, because it can be changed into a prime (102120443) 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, 13318 + ... + 19534.

It is an arithmetic number, because the mean of its divisors is an integer number (9849312).

Almost surely, 2^102120442 is an apocalyptic number.

102120442 is a deficient number, since it is larger than the sum of its proper divisors (55468550).

102120442 is a wasteful number, since it uses less digits than its factorization.

102120442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6453.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 102120442 is about 10105.4659467043. The cubic root of 102120442 is about 467.4167039678.

Adding to 102120442 its reverse (244021201), we get a palindrome (346141643).

The spelling of 102120442 in words is "one hundred two million, one hundred twenty thousand, four hundred forty-two".