159121890 has 48 divisors (see below), whose sum is σ = 414460800. Its totient is φ = 42356256.

The previous prime is 159121883. The next prime is 159121913. The reversal of 159121890 is 98121951.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63481 + ... + 65939.

It is an arithmetic number, because the mean of its divisors is an integer number (8634600).

Almost surely, 2^159121890 is an apocalyptic number.

159121890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

159121890 is an abundant number, since it is smaller than the sum of its proper divisors (255338910).

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

159121890 is a wasteful number, since it uses less digits than its factorization.

159121890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191 (or 3188 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The square root of 159121890 is about 12614.3525398651. The cubic root of 159121890 is about 541.8885520411. Note that the first 3 decimals are identical.

The spelling of 159121890 in words is "one hundred fifty-nine million, one hundred twenty-one thousand, eight hundred ninety".