102010042 has 4 divisors (see below), whose sum is σ = 153015066. Its totient is φ = 51005020.

The previous prime is 102010039. The next prime is 102010087. The reversal of 102010042 is 240010201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240010201 = 1493 ⋅160757.

It can be written as a sum of positive squares in only one way, i.e., 101586241 + 423801 = 10079^2 + 651^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25502509 + ... + 25502512.

Almost surely, 2^102010042 is an apocalyptic number.

102010042 is a deficient number, since it is larger than the sum of its proper divisors (51005024).

102010042 is an equidigital number, since it uses as much as digits as its factorization.

102010042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51005023.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 102010042 is about 10100.0020792077. The cubic root of 102010042 is about 467.2482055105.

Adding to 102010042 its reverse (240010201), we get a palindrome (342020243).

The spelling of 102010042 in words is "one hundred two million, ten thousand, forty-two".