161400325 has 12 divisors (see below), whose sum is σ = 200447488. Its totient is φ = 128919600.

The previous prime is 161400319. The next prime is 161400331. The reversal of 161400325 is 523004161.

It is an interprime number because it is at equal distance from previous prime (161400319) and next prime (161400331).

It is not a de Polignac number, because 161400325 - 2⁵ = 161400293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161400296 and 161400305.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 12604 + ... + 21946.

Almost surely, 2^161400325 is an apocalyptic number.

It is an amenable number.

161400325 is a deficient number, since it is larger than the sum of its proper divisors (39047163).

161400325 is an equidigital number, since it uses as much as digits as its factorization.

161400325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10044 (or 10039 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 161400325 is about 12704.3427614340. The cubic root of 161400325 is about 544.4627030837.

Adding to 161400325 its reverse (523004161), we get a palindrome (684404486).

The spelling of 161400325 in words is "one hundred sixty-one million, four hundred thousand, three hundred twenty-five".