158064021 has 16 divisors (see below), whose sum is σ = 246494400. Its totient is φ = 99829584.

The previous prime is 158064017. The next prime is 158064031. The reversal of 158064021 is 120460851.

158064021 is a `hidden beast` number, since 1 + 580 + 64 + 0 + 21 = 666.

It is not a de Polignac number, because 158064021 - 2² = 158064017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158064031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153546 + ... + 154571.

It is an arithmetic number, because the mean of its divisors is an integer number (15405900).

Almost surely, 2^158064021 is an apocalyptic number.

It is an amenable number.

158064021 is a deficient number, since it is larger than the sum of its proper divisors (88430379).

158064021 is a wasteful number, since it uses less digits than its factorization.

158064021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308145 (or 308139 counting only the distinct ones).

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

The square root of 158064021 is about 12572.3514507032. The cubic root of 158064021 is about 540.6850256939.

The spelling of 158064021 in words is "one hundred fifty-eight million, sixty-four thousand, twenty-one".