158402321 has 16 divisors (see below), whose sum is σ = 204301440. Its totient is φ = 119172480.

The previous prime is 158402317. The next prime is 158402323. The reversal of 158402321 is 123204851.

It is not a de Polignac number, because 158402321 - 2² = 158402317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158402323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33236 + ... + 37701.

It is an arithmetic number, because the mean of its divisors is an integer number (12768840).

Almost surely, 2^158402321 is an apocalyptic number.

158402321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

158402321 is a deficient number, since it is larger than the sum of its proper divisors (45899119).

158402321 is a wasteful number, since it uses less digits than its factorization.

158402321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70984.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 158402321 is about 12585.7983854819. The cubic root of 158402321 is about 541.0704885018.

The spelling of 158402321 in words is "one hundred fifty-eight million, four hundred two thousand, three hundred twenty-one".