161122425 has 24 divisors (see below), whose sum is σ = 266765664. Its totient is φ = 85810560.

The previous prime is 161122421. The next prime is 161122427. The reversal of 161122425 is 524221161.

It is not a de Polignac number, because 161122425 - 2² = 161122421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161122395 and 161122404.

It is not an unprimeable number, because it can be changed into a prime (161122421) 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 23 ways as a sum of consecutive naturals, for example, 83269 + ... + 85181.

It is an arithmetic number, because the mean of its divisors is an integer number (11115236).

Almost surely, 2^161122425 is an apocalyptic number.

161122425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161122425 is a deficient number, since it is larger than the sum of its proper divisors (105643239).

161122425 is a wasteful number, since it uses less digits than its factorization.

161122425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3049 (or 3044 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 161122425 is about 12693.4008445334. The cubic root of 161122425 is about 544.1500372360.

Adding to 161122425 its reverse (524221161), we get a palindrome (685343586).

The spelling of 161122425 in words is "one hundred sixty-one million, one hundred twenty-two thousand, four hundred twenty-five".