161071525 has 6 divisors (see below), whose sum is σ = 199728722. Its totient is φ = 128857200.

The previous prime is 161071517. The next prime is 161071571. The reversal of 161071525 is 525170161.

It can be written as a sum of positive squares in 3 ways, for example, as 111556 + 160959969 = 334^2 + 12687^2 .

It is not a de Polignac number, because 161071525 - 2³ = 161071517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161071493 and 161071502.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 3221406 + ... + 3221455.

Almost surely, 2^161071525 is an apocalyptic number.

It is an amenable number.

161071525 is a deficient number, since it is larger than the sum of its proper divisors (38657197).

161071525 is an equidigital number, since it uses as much as digits as its factorization.

161071525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6442871 (or 6442866 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 161071525 is about 12691.3957073286. The cubic root of 161071525 is about 544.0927305968.

It can be divided in two parts, 161071 and 525, that added together give a triangular number (161596 = T₅₆₈).

The spelling of 161071525 in words is "one hundred sixty-one million, seventy-one thousand, five hundred twenty-five".