158642001 has 24 divisors (see below), whose sum is σ = 275670720. Its totient is φ = 85880736.

The previous prime is 158641999. The next prime is 158642023. The reversal of 158642001 is 100246851.

158642001 is a `hidden beast` number, since 15 + 8 + 642 + 0 + 0 + 1 = 666.

It is not a de Polignac number, because 158642001 - 2¹ = 158641999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158622001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65070 + ... + 67463.

It is an arithmetic number, because the mean of its divisors is an integer number (11486280).

Almost surely, 2^158642001 is an apocalyptic number.

It is an amenable number.

158642001 is a deficient number, since it is larger than the sum of its proper divisors (117028719).

158642001 is a wasteful number, since it uses less digits than its factorization.

158642001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132565 (or 132562 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 158642001 is about 12595.3166296048. The cubic root of 158642001 is about 541.3432505426.

Adding to 158642001 its reverse (100246851), we get a palindrome (258888852).

The spelling of 158642001 in words is "one hundred fifty-eight million, six hundred forty-two thousand, one".