102424138 has 4 divisors (see below), whose sum is σ = 153636210. Its totient is φ = 51212068.

The previous prime is 102424111. The next prime is 102424159. The reversal of 102424138 is 831424201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831424201 = 1549 ⋅536749.

It can be written as a sum of positive squares in only one way, i.e., 76790169 + 25633969 = 8763^2 + 5063^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25606033 + ... + 25606036.

Almost surely, 2^102424138 is an apocalyptic number.

102424138 is a deficient number, since it is larger than the sum of its proper divisors (51212072).

102424138 is an equidigital number, since it uses as much as digits as its factorization.

102424138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51212071.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 102424138 is about 10120.4811150459. The cubic root of 102424138 is about 467.8795956115.

Adding to 102424138 its reverse (831424201), we get a palindrome (933848339).

The spelling of 102424138 in words is "one hundred two million, four hundred twenty-four thousand, one hundred thirty-eight".