102125157 has 4 divisors (see below), whose sum is σ = 136166880. Its totient is φ = 68083436.

The previous prime is 102125147. The next prime is 102125159. The reversal of 102125157 is 751521201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 751521201 = 3 ⋅250507067.

It is a cyclic number.

It is not a de Polignac number, because 102125157 - 2⁴ = 102125141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102125159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17020857 + ... + 17020862.

It is an arithmetic number, because the mean of its divisors is an integer number (34041720).

Almost surely, 2^102125157 is an apocalyptic number.

It is an amenable number.

102125157 is a deficient number, since it is larger than the sum of its proper divisors (34041723).

102125157 is an equidigital number, since it uses as much as digits as its factorization.

102125157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34041722.

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 102125157 is about 10105.6992336008. The cubic root of 102125157 is about 467.4238975515.

Adding to 102125157 its reverse (751521201), we get a palindrome (853646358).

The spelling of 102125157 in words is "one hundred two million, one hundred twenty-five thousand, one hundred fifty-seven".