42942920 has 16 divisors (see below), whose sum is σ = 96621660. Its totient is φ = 17177152.

The previous prime is 42942883. The next prime is 42942923. The reversal of 42942920 is 2924924.

It can be written as a sum of positive squares in 2 ways, for example, as 42172036 + 770884 = 6494^2 + 878^2 .

It is not an unprimeable number, because it can be changed into a prime (42942923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536747 + ... + 536826.

Almost surely, 2^42942920 is an apocalyptic number.

42942920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42942920 is an abundant number, since it is smaller than the sum of its proper divisors (53678740).

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

42942920 is a wasteful number, since it uses less digits than its factorization.

42942920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073584 (or 1073580 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 42942920 is about 6553.0847697859. The cubic root of 42942920 is about 350.1847188207.

The spelling of 42942920 in words is "forty-two million, nine hundred forty-two thousand, nine hundred twenty".