159750921 has 32 divisors (see below), whose sum is σ = 247684608. Its totient is φ = 90512640.

The previous prime is 159750869. The next prime is 159750931. The reversal of 159750921 is 129057951.

It is not a de Polignac number, because 159750921 - 2¹¹ = 159748873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 159750921.

It is not an unprimeable number, because it can be changed into a prime (159750931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90570 + ... + 92316.

It is an arithmetic number, because the mean of its divisors is an integer number (7740144).

Almost surely, 2^159750921 is an apocalyptic number.

159750921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

159750921 is a deficient number, since it is larger than the sum of its proper divisors (87933687).

159750921 is a wasteful number, since it uses less digits than its factorization.

159750921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941.

The product of its (nonzero) digits is 28350, while the sum is 39.

The square root of 159750921 is about 12639.2610939089. The cubic root of 159750921 is about 542.6016668316.

The spelling of 159750921 in words is "one hundred fifty-nine million, seven hundred fifty thousand, nine hundred twenty-one".