42920289 has 6 divisors (see below), whose sum is σ = 61995986. Its totient is φ = 28613520.

The previous prime is 42920287. The next prime is 42920303. The reversal of 42920289 is 98202924.

42920289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 41177889 + 1742400 = 6417^2 + 1320^2 .

It is not a de Polignac number, because 42920289 - 2¹ = 42920287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42920287) 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 5 ways as a sum of consecutive naturals, for example, 2384452 + ... + 2384469.

Almost surely, 2^42920289 is an apocalyptic number.

It is an amenable number.

42920289 is a deficient number, since it is larger than the sum of its proper divisors (19075697).

42920289 is a wasteful number, since it uses less digits than its factorization.

42920289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4768927 (or 4768924 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 42920289 is about 6551.3577981973. The cubic root of 42920289 is about 350.1231920083.

The spelling of 42920289 in words is "forty-two million, nine hundred twenty thousand, two hundred eighty-nine".