161925154 has 32 divisors (see below), whose sum is σ = 259686000. Its totient is φ = 75586560.

The previous prime is 161925151. The next prime is 161925161. The reversal of 161925154 is 451529161.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 37491129 + 124434025 = 6123^2 + 11155^2 .

It is not an unprimeable number, because it can be changed into a prime (161925151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 354094 + ... + 354550.

Almost surely, 2^161925154 is an apocalyptic number.

161925154 is a deficient number, since it is larger than the sum of its proper divisors (97760846).

161925154 is a wasteful number, since it uses less digits than its factorization.

161925154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678.

The product of its digits is 10800, while the sum is 34.

The square root of 161925154 is about 12724.9814931103. The cubic root of 161925154 is about 545.0522117024.

The spelling of 161925154 in words is "one hundred sixty-one million, nine hundred twenty-five thousand, one hundred fifty-four".