158357421 has 12 divisors (see below), whose sum is σ = 228963072. Its totient is φ = 105467976.

The previous prime is 158357411. The next prime is 158357473. The reversal of 158357421 is 124753851.

158357421 is a `hidden beast` number, since 1 + 5 + 83 + 574 + 2 + 1 = 666.

It is not a de Polignac number, because 158357421 - 2⁵ = 158357389 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158357401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1690 + ... + 17876.

It is an arithmetic number, because the mean of its divisors is an integer number (19080256).

Almost surely, 2^158357421 is an apocalyptic number.

It is an amenable number.

158357421 is a deficient number, since it is larger than the sum of its proper divisors (70605651).

158357421 is a wasteful number, since it uses less digits than its factorization.

158357421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17280 (or 17277 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 158357421 is about 12584.0145025346. The cubic root of 158357421 is about 541.0193605457.

The spelling of 158357421 in words is "one hundred fifty-eight million, three hundred fifty-seven thousand, four hundred twenty-one".