161425243 has 8 divisors (see below), whose sum is σ = 185518080. Its totient is φ = 137590440.

The previous prime is 161425237. The next prime is 161425279. The reversal of 161425243 is 342524161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161425243 - 2¹⁷ = 161294171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161425283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63163 + ... + 65668.

It is an arithmetic number, because the mean of its divisors is an integer number (23189760).

Almost surely, 2^161425243 is an apocalyptic number.

161425243 is a deficient number, since it is larger than the sum of its proper divisors (24092837).

161425243 is a wasteful number, since it uses less digits than its factorization.

161425243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129017.

The product of its digits is 5760, while the sum is 28.

The square root of 161425243 is about 12705.3234118617. The cubic root of 161425243 is about 544.4907208371.

The spelling of 161425243 in words is "one hundred sixty-one million, four hundred twenty-five thousand, two hundred forty-three".