161236730 has 16 divisors (see below), whose sum is σ = 290455200. Its totient is φ = 64443792.

The previous prime is 161236729. The next prime is 161236741. The reversal of 161236730 is 37632161.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161236693 and 161236702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8621 + ... + 19919.

It is an arithmetic number, because the mean of its divisors is an integer number (18153450).

Almost surely, 2^161236730 is an apocalyptic number.

161236730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161236730 is a deficient number, since it is larger than the sum of its proper divisors (129218470).

161236730 is a wasteful number, since it uses less digits than its factorization.

161236730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12733.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 161236730 is about 12697.9025827103. The cubic root of 161236730 is about 544.2786855132.

Adding to 161236730 its reverse (37632161), we get a palindrome (198868891).

The spelling of 161236730 in words is "one hundred sixty-one million, two hundred thirty-six thousand, seven hundred thirty".