161403325 has 12 divisors (see below), whose sum is σ = 201584320. Its totient is φ = 128190960.

The previous prime is 161403317. The next prime is 161403337. The reversal of 161403325 is 523304161.

It is not a de Polignac number, because 161403325 - 2³ = 161403317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 161403325.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 19749 + ... + 26698.

Almost surely, 2^161403325 is an apocalyptic number.

It is an amenable number.

161403325 is a deficient number, since it is larger than the sum of its proper divisors (40180995).

161403325 is a wasteful number, since it uses less digits than its factorization.

161403325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46596 (or 46591 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 161403325 is about 12704.4608307476. The cubic root of 161403325 is about 544.4660764308.

Adding to 161403325 its reverse (523304161), we get a palindrome (684707486).

The spelling of 161403325 in words is "one hundred sixty-one million, four hundred three thousand, three hundred twenty-five".