161926925 has 12 divisors (see below), whose sum is σ = 204579540. Its totient is φ = 127096320.

The previous prime is 161926909. The next prime is 161926927. The reversal of 161926925 is 529629161.

161926925 = 2533² + 2534² + ... + 2557².

It can be written as a sum of positive squares in 6 ways, for example, as 18550249 + 143376676 = 4307^2 + 11974^2 .

It is not a de Polignac number, because 161926925 - 2⁴ = 161926909 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161926927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59780 + ... + 62429.

It is an arithmetic number, because the mean of its divisors is an integer number (17048295).

Almost surely, 2^161926925 is an apocalyptic number.

It is an amenable number.

161926925 is a deficient number, since it is larger than the sum of its proper divisors (42652615).

161926925 is a wasteful number, since it uses less digits than its factorization.

161926925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122272 (or 122267 counting only the distinct ones).

The product of its digits is 58320, while the sum is 41.

The square root of 161926925 is about 12725.0510804476. The cubic root of 161926925 is about 545.0541988015.

The spelling of 161926925 in words is "one hundred sixty-one million, nine hundred twenty-six thousand, nine hundred twenty-five".