158642985 has 8 divisors (see below), whose sum is σ = 253828800. Its totient is φ = 84609584.

The previous prime is 158642977. The next prime is 158642993. The reversal of 158642985 is 589246851.

158642985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (158642977) and next prime (158642993).

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

It is a cyclic number.

It is not a de Polignac number, because 158642985 - 2³ = 158642977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5288085 + ... + 5288114.

It is an arithmetic number, because the mean of its divisors is an integer number (31728600).

Almost surely, 2^158642985 is an apocalyptic number.

158642985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

158642985 is a deficient number, since it is larger than the sum of its proper divisors (95185815).

158642985 is a wasteful number, since it uses less digits than its factorization.

158642985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10576207.

The product of its digits is 691200, while the sum is 48.

The square root of 158642985 is about 12595.3556916825. The cubic root of 158642985 is about 541.3443697936.

The spelling of 158642985 in words is "one hundred fifty-eight million, six hundred forty-two thousand, nine hundred eighty-five".