102004157 has 4 divisors (see below), whose sum is σ = 102449820. Its totient is φ = 101558496.

The previous prime is 102004121. The next prime is 102004159. The reversal of 102004157 is 751400201.

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 51466276 + 50537881 = 7174^2 + 7109^2 .

It is a cyclic number.

It is not a de Polignac number, because 102004157 - 2⁸ = 102003901 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 (102004159) 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, 222488 + ... + 222945.

It is an arithmetic number, because the mean of its divisors is an integer number (25612455).

Almost surely, 2^102004157 is an apocalyptic number.

It is an amenable number.

102004157 is a deficient number, since it is larger than the sum of its proper divisors (445663).

102004157 is an equidigital number, since it uses as much as digits as its factorization.

102004157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445662.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 102004157 is about 10099.7107384321. The cubic root of 102004157 is about 467.2392200926.

Adding to 102004157 its reverse (751400201), we get a palindrome (853404358).

The spelling of 102004157 in words is "one hundred two million, four thousand, one hundred fifty-seven".