161225102 has 8 divisors (see below), whose sum is σ = 244555200. Its totient is φ = 79706704.

The previous prime is 161225039. The next prime is 161225107. The reversal of 161225102 is 201522161.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161225107) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 452702 + ... + 453057.

It is an arithmetic number, because the mean of its divisors is an integer number (30569400).

Almost surely, 2^161225102 is an apocalyptic number.

161225102 is a deficient number, since it is larger than the sum of its proper divisors (83330098).

161225102 is an equidigital number, since it uses as much as digits as its factorization.

161225102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905850.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 161225102 is about 12697.4447035614. Note that the first 3 decimals coincide. The cubic root of 161225102 is about 544.2656011812.

Adding to 161225102 its reverse (201522161), we get a palindrome (362747263).

The spelling of 161225102 in words is "one hundred sixty-one million, two hundred twenty-five thousand, one hundred two".