102042013 has 4 divisors (see below), whose sum is σ = 103967388. Its totient is φ = 100116640.

The previous prime is 102042011. The next prime is 102042019. The reversal of 102042013 is 310240201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52099524 + 49942489 = 7218^2 + 7067^2 .

It is a cyclic number.

It is not a de Polignac number, because 102042013 - 2¹ = 102042011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102041984 and 102042002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102042011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 962608 + ... + 962713.

It is an arithmetic number, because the mean of its divisors is an integer number (25991847).

Almost surely, 2^102042013 is an apocalyptic number.

It is an amenable number.

102042013 is a deficient number, since it is larger than the sum of its proper divisors (1925375).

102042013 is an equidigital number, since it uses as much as digits as its factorization.

102042013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925374.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 102042013 is about 10101.5846776632. The cubic root of 102042013 is about 467.2970138819.

Adding to 102042013 its reverse (310240201), we get a palindrome (412282214).

The spelling of 102042013 in words is "one hundred two million, forty-two thousand, thirteen".