161601424 has 10 divisors (see below), whose sum is σ = 313102790. Its totient is φ = 80800704.

The previous prime is 161601389. The next prime is 161601437. The reversal of 161601424 is 424106161.

161601424 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 155451024 + 6150400 = 12468^2 + 2480^2 .

It is a super-2 number, since 2×161601424² = 52230040477655552, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 5050029 + ... + 5050060.

It is an arithmetic number, because the mean of its divisors is an integer number (31310279).

Almost surely, 2^161601424 is an apocalyptic number.

It is an amenable number.

161601424 is a deficient number, since it is larger than the sum of its proper divisors (151501366).

161601424 is a wasteful number, since it uses less digits than its factorization.

161601424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10100097 (or 10100091 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 161601424 is about 12712.2548747262. The cubic root of 161601424 is about 544.6887362152.

Adding to 161601424 its reverse (424106161), we get a palindrome (585707585).

The spelling of 161601424 in words is "one hundred sixty-one million, six hundred one thousand, four hundred twenty-four".