159123940 has 36 divisors (see below), whose sum is σ = 339027444. Its totient is φ = 62735616.

The previous prime is 159123919. The next prime is 159123953. The reversal of 159123940 is 49321951.

It can be written as a sum of positive squares in 6 ways, for example, as 6749604 + 152374336 = 2598^2 + 12344^2 .

It is a super-2 number, since 2×159123940² = 50640856562247200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 159123896 and 159123905.

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 in 11 ways as a sum of consecutive naturals, for example, 105834 + ... + 107326.

It is an arithmetic number, because the mean of its divisors is an integer number (9417429).

Almost surely, 2^159123940 is an apocalyptic number.

159123940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

159123940 is an abundant number, since it is smaller than the sum of its proper divisors (179903504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

159123940 is a wasteful number, since it uses less digits than its factorization.

159123940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648 (or 1573 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 159123940 is about 12614.4337962510. The cubic root of 159123940 is about 541.8908791183.

The spelling of 159123940 in words is "one hundred fifty-nine million, one hundred twenty-three thousand, nine hundred forty".