161247732 has 24 divisors (see below), whose sum is σ = 377938176. Its totient is φ = 53507328.

The previous prime is 161247731. The next prime is 161247763. The reversal of 161247732 is 237742161.

It is a junction number, because it is equal to n+sod(n) for n = 161247693 and 161247702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161247731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27453 + ... + 32804.

It is an arithmetic number, because the mean of its divisors is an integer number (15747424).

Almost surely, 2^161247732 is an apocalyptic number.

161247732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161247732 is an abundant number, since it is smaller than the sum of its proper divisors (216690444).

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

161247732 is a wasteful number, since it uses less digits than its factorization.

161247732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60487 (or 60485 counting only the distinct ones).

The product of its digits is 14112, while the sum is 33.

The square root of 161247732 is about 12698.3357964735. The cubic root of 161247732 is about 544.2910648635.

Adding to 161247732 its reverse (237742161), we get a palindrome (398989893).

The spelling of 161247732 in words is "one hundred sixty-one million, two hundred forty-seven thousand, seven hundred thirty-two".