161235000 has 120 divisors (see below), whose sum is σ = 545825280. Its totient is φ = 42984000.

The previous prime is 161234977. The next prime is 161235029. The reversal of 161235000 is 532161.

161235000 is a `hidden beast` number, since 1 + 612 + 3 + 50 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 43209 + ... + 46791.

It is an arithmetic number, because the mean of its divisors is an integer number (4548544).

Almost surely, 2^161235000 is an apocalyptic number.

161235000 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 161235000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272912640).

161235000 is an abundant number, since it is smaller than the sum of its proper divisors (384590280).

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

161235000 is a wasteful number, since it uses less digits than its factorization.

161235000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3615 (or 3593 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 161235000 is about 12697.8344610410. The cubic root of 161235000 is about 544.2767388817.

Adding to 161235000 its reverse (532161), we get a palindrome (161767161).

The spelling of 161235000 in words is "one hundred sixty-one million, two hundred thirty-five thousand".