161032401 has 8 divisors (see below), whose sum is σ = 238566560. Its totient is φ = 107354916.

The previous prime is 161032397. The next prime is 161032409. The reversal of 161032401 is 104230161.

It is a happy number.

It is not a de Polignac number, because 161032401 - 2² = 161032397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161032409) 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, 2982055 + ... + 2982108.

It is an arithmetic number, because the mean of its divisors is an integer number (29820820).

Almost surely, 2^161032401 is an apocalyptic number.

It is an amenable number.

161032401 is a deficient number, since it is larger than the sum of its proper divisors (77534159).

161032401 is an equidigital number, since it uses as much as digits as its factorization.

161032401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5964172 (or 5964166 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 161032401 is about 12689.8542544822. The cubic root of 161032401 is about 544.0486739626.

Adding to 161032401 its reverse (104230161), we get a palindrome (265262562).

The spelling of 161032401 in words is "one hundred sixty-one million, thirty-two thousand, four hundred one".