159453421 has 4 divisors (see below), whose sum is σ = 168833052. Its totient is φ = 150073792.

The previous prime is 159453409. The next prime is 159453431. The reversal of 159453421 is 124354951.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102616900 + 56836521 = 10130^2 + 7539^2 .

It is a cyclic number.

It is not a de Polignac number, because 159453421 - 2⁷ = 159453293 is a prime.

It is a super-5 number, since 5×159453421⁵ (a number of 42 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159453431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4689790 + ... + 4689823.

It is an arithmetic number, because the mean of its divisors is an integer number (42208263).

Almost surely, 2^159453421 is an apocalyptic number.

It is an amenable number.

159453421 is a deficient number, since it is larger than the sum of its proper divisors (9379631).

159453421 is an equidigital number, since it uses as much as digits as its factorization.

159453421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9379630.

The product of its digits is 21600, while the sum is 34.

The square root of 159453421 is about 12627.4867253939. The cubic root of 159453421 is about 542.2646331880.

The spelling of 159453421 in words is "one hundred fifty-nine million, four hundred fifty-three thousand, four hundred twenty-one".