42643154 has 4 divisors (see below), whose sum is σ = 63964734. Its totient is φ = 21321576.

The previous prime is 42643141. The next prime is 42643187. The reversal of 42643154 is 45134624.

42643154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34492129 + 8151025 = 5873^2 + 2855^2 .

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10660787 + ... + 10660790.

Almost surely, 2^42643154 is an apocalyptic number.

42643154 is a deficient number, since it is larger than the sum of its proper divisors (21321580).

42643154 is a wasteful number, since it uses less digits than its factorization.

42643154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21321579.

The product of its digits is 11520, while the sum is 29.

The square root of 42643154 is about 6530.1725857744. The cubic root of 42643154 is about 349.3679859554.

Adding to 42643154 its reverse (45134624), we get a palindrome (87777778).

The spelling of 42643154 in words is "forty-two million, six hundred forty-three thousand, one hundred fifty-four".