159021970 has 8 divisors (see below), whose sum is σ = 286239564. Its totient is φ = 63608784.

The previous prime is 159021917. The next prime is 159021979. The reversal of 159021970 is 79120951.

It can be written as a sum of positive squares in 2 ways, for example, as 158684409 + 337561 = 12597^2 + 581^2 .

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

It is not an unprimeable number, because it can be changed into a prime (159021979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7951089 + ... + 7951108.

Almost surely, 2^159021970 is an apocalyptic number.

159021970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

159021970 is a deficient number, since it is larger than the sum of its proper divisors (127217594).

159021970 is a wasteful number, since it uses less digits than its factorization.

159021970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15902204.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 159021970 is about 12610.3913499939. The cubic root of 159021970 is about 541.7751026564.

The spelling of 159021970 in words is "one hundred fifty-nine million, twenty-one thousand, nine hundred seventy".