158669421 has 8 divisors (see below), whose sum is σ = 211645920. Its totient is φ = 105736272.

The previous prime is 158669419. The next prime is 158669453. The reversal of 158669421 is 124966851.

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

It is not a de Polignac number, because 158669421 - 2¹ = 158669419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158669461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1026 + ... + 17843.

It is an arithmetic number, because the mean of its divisors is an integer number (26455740).

Almost surely, 2^158669421 is an apocalyptic number.

It is an amenable number.

158669421 is a deficient number, since it is larger than the sum of its proper divisors (52976499).

158669421 is a wasteful number, since it uses less digits than its factorization.

158669421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21675.

The product of its digits is 103680, while the sum is 42.

The square root of 158669421 is about 12596.4050824035. The cubic root of 158669421 is about 541.3744376951.

The spelling of 158669421 in words is "one hundred fifty-eight million, six hundred sixty-nine thousand, four hundred twenty-one".