154986642 has 32 divisors (see below), whose sum is σ = 352820160. Its totient is φ = 50401440.

The previous prime is 154986617. The next prime is 154986649. The reversal of 154986642 is 246689451.

154986642 is a `hidden beast` number, since 1 + 549 + 8 + 66 + 42 = 666.

It is not an unprimeable number, because it can be changed into a prime (154986649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32788 + ... + 37215.

It is an arithmetic number, because the mean of its divisors is an integer number (11025630).

Almost surely, 2^154986642 is an apocalyptic number.

154986642 is an abundant number, since it is smaller than the sum of its proper divisors (197833518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

154986642 is a wasteful number, since it uses less digits than its factorization.

154986642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70055 (or 70049 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 154986642 is about 12449.3631162401. The cubic root of 154986642 is about 537.1531038742.

The spelling of 154986642 in words is "one hundred fifty-four million, nine hundred eighty-six thousand, six hundred forty-two".