390125161 has 2 divisors, whose sum is σ = 390125162. Its totient is φ = 390125160.

The previous prime is 390125159. The next prime is 390125167. The reversal of 390125161 is 161521093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199685161 + 190440000 = 14131^2 + 13800^2 .

It is a cyclic number.

It is not a de Polignac number, because 390125161 - 2¹ = 390125159 is a prime.

Together with 390125159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (390125167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195062580 + 195062581.

It is an arithmetic number, because the mean of its divisors is an integer number (195062581).

Almost surely, 2^390125161 is an apocalyptic number.

It is an amenable number.

390125161 is a deficient number, since it is larger than the sum of its proper divisors (1).

390125161 is an equidigital number, since it uses as much as digits as its factorization.

390125161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 390125161 is about 19751.5862907261. The cubic root of 390125161 is about 730.6925066738.

It can be divided in two parts, 390125 and 161, that added together give a triangular number (390286 = T₈₈₃).

The spelling of 390125161 in words is "three hundred ninety million, one hundred twenty-five thousand, one hundred sixty-one".