161396120 has 48 divisors (see below), whose sum is σ = 372137760. Its totient is φ = 62969216.

The previous prime is 161396063. The next prime is 161396141. The reversal of 161396120 is 21693161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 550694 + ... + 550986.

It is an arithmetic number, because the mean of its divisors is an integer number (7752870).

Almost surely, 2^161396120 is an apocalyptic number.

161396120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161396120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186068880).

161396120 is an abundant number, since it is smaller than the sum of its proper divisors (210741640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161396120 is an equidigital number, since it uses as much as digits as its factorization.

161396120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 161396120 is about 12704.1772657658. The cubic root of 161396120 is about 544.4579747050.

The spelling of 161396120 in words is "one hundred sixty-one million, three hundred ninety-six thousand, one hundred twenty".