103242157 has 4 divisors (see below), whose sum is σ = 103270140. Its totient is φ = 103214176.

The previous prime is 103242151. The next prime is 103242187. The reversal of 103242157 is 751242301.

It is a happy number.

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 35772361 + 67469796 = 5981^2 + 8214^2 .

It is a cyclic number.

It is not a de Polignac number, because 103242157 - 2¹⁵ = 103209389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103242151) 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, 7432 + ... + 16177.

It is an arithmetic number, because the mean of its divisors is an integer number (25817535).

Almost surely, 2^103242157 is an apocalyptic number.

It is an amenable number.

103242157 is a deficient number, since it is larger than the sum of its proper divisors (27983).

103242157 is an equidigital number, since it uses as much as digits as its factorization.

103242157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27982.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 103242157 is about 10160.8147803215. The cubic root of 103242157 is about 469.1218808445.

Adding to 103242157 its reverse (751242301), we get a palindrome (854484458).

The spelling of 103242157 in words is "one hundred three million, two hundred forty-two thousand, one hundred fifty-seven".