158420587 has 4 divisors (see below), whose sum is σ = 170606800. Its totient is φ = 146234376.

The previous prime is 158420579. The next prime is 158420609. The reversal of 158420587 is 785024851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 785024851 = 13 ⋅60386527.

It is a cyclic number.

It is not a de Polignac number, because 158420587 - 2³ = 158420579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158420387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6093087 + ... + 6093112.

It is an arithmetic number, because the mean of its divisors is an integer number (42651700).

Almost surely, 2^158420587 is an apocalyptic number.

158420587 is a deficient number, since it is larger than the sum of its proper divisors (12186213).

158420587 is a wasteful number, since it uses less digits than its factorization.

158420587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12186212.

The product of its (nonzero) digits is 89600, while the sum is 40.

The square root of 158420587 is about 12586.5240237327. The cubic root of 158420587 is about 541.0912853639.

The spelling of 158420587 in words is "one hundred fifty-eight million, four hundred twenty thousand, five hundred eighty-seven".