161247125 has 48 divisors (see below), whose sum is σ = 231238800. Its totient is φ = 111820800.

The previous prime is 161247109. The next prime is 161247131. The reversal of 161247125 is 521742161.

It can be written as a sum of positive squares in 24 ways, for example, as 161239204 + 7921 = 12698^2 + 89^2 .

It is not a de Polignac number, because 161247125 - 2⁴ = 161247109 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 358901 + ... + 359349.

It is an arithmetic number, because the mean of its divisors is an integer number (4817475).

Almost surely, 2^161247125 is an apocalyptic number.

It is an amenable number.

161247125 is a deficient number, since it is larger than the sum of its proper divisors (69991675).

161247125 is a wasteful number, since it uses less digits than its factorization.

161247125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 484 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 161247125 is about 12698.3118956813. The cubic root of 161247125 is about 544.2903818873.

Adding to 161247125 its reverse (521742161), we get a palindrome (682989286).

The spelling of 161247125 in words is "one hundred sixty-one million, two hundred forty-seven thousand, one hundred twenty-five".