159491642 has 8 divisors (see below), whose sum is σ = 239466132. Its totient is φ = 79669600.

The previous prime is 159491627. The next prime is 159491659. The reversal of 159491642 is 246194951.

It is a Cunningham number, because it is equal to 12629²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 159491641 + 1 = 12629^2 + 1^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 159491642.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35459 + ... + 39702.

Almost surely, 2^159491642 is an apocalyptic number.

159491642 is a deficient number, since it is larger than the sum of its proper divisors (79974490).

159491642 is a wasteful number, since it uses less digits than its factorization.

159491642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76224.

The product of its digits is 77760, while the sum is 41.

The square root of 159491642 is about 12629.0000395914. Note that the first 4 decimals coincide. The cubic root of 159491642 is about 542.3079566878.

The spelling of 159491642 in words is "one hundred fifty-nine million, four hundred ninety-one thousand, six hundred forty-two".