161428201 has 8 divisors (see below), whose sum is σ = 176347008. Its totient is φ = 146550000.

The previous prime is 161428187. The next prime is 161428213. The reversal of 161428201 is 102824161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161428201 - 2⁹ = 161427689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161428231) 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, 1510 + ... + 18031.

It is an arithmetic number, because the mean of its divisors is an integer number (22043376).

Almost surely, 2^161428201 is an apocalyptic number.

161428201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

161428201 is a deficient number, since it is larger than the sum of its proper divisors (14918807).

161428201 is a wasteful number, since it uses less digits than its factorization.

161428201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20303.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 161428201 is about 12705.4398192270. The cubic root of 161428201 is about 544.4940466154.

The spelling of 161428201 in words is "one hundred sixty-one million, four hundred twenty-eight thousand, two hundred one".