158978542 has 16 divisors (see below), whose sum is σ = 240677712. Its totient is φ = 78756480.

The previous prime is 158978537. The next prime is 158978563. The reversal of 158978542 is 245879851.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 108688 + ... + 110140.

It is an arithmetic number, because the mean of its divisors is an integer number (15042357).

Almost surely, 2^158978542 is an apocalyptic number.

158978542 is a deficient number, since it is larger than the sum of its proper divisors (81699170).

158978542 is a wasteful number, since it uses less digits than its factorization.

158978542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923.

The product of its digits is 806400, while the sum is 49.

The square root of 158978542 is about 12608.6693191629. The cubic root of 158978542 is about 541.7257795947.

The spelling of 158978542 in words is "one hundred fifty-eight million, nine hundred seventy-eight thousand, five hundred forty-two".