102125389 has 2 divisors, whose sum is σ = 102125390. Its totient is φ = 102125388.

The previous prime is 102125369. The next prime is 102125411. The reversal of 102125389 is 983521201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71267364 + 30858025 = 8442^2 + 5555^2 .

It is a cyclic number.

It is not a de Polignac number, because 102125389 - 2⁹ = 102124877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102125389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102125369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51062694 + 51062695.

It is an arithmetic number, because the mean of its divisors is an integer number (51062695).

Almost surely, 2^102125389 is an apocalyptic number.

It is an amenable number.

102125389 is a deficient number, since it is larger than the sum of its proper divisors (1).

102125389 is an equidigital number, since it uses as much as digits as its factorization.

102125389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 102125389 is about 10105.7107122656. The cubic root of 102125389 is about 467.4242515037.

The spelling of 102125389 in words is "one hundred two million, one hundred twenty-five thousand, three hundred eighty-nine".