42428277 has 12 divisors (see below), whose sum is σ = 64890540. Its totient is φ = 26621568.

The previous prime is 42428237. The next prime is 42428303. The reversal of 42428277 is 77282424.

It can be written as a sum of positive squares in 2 ways, for example, as 16966161 + 25462116 = 4119^2 + 5046^2 .

It is not a de Polignac number, because 42428277 - 2⁶ = 42428213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42428237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138502 + ... + 138807.

It is an arithmetic number, because the mean of its divisors is an integer number (5407545).

Almost surely, 2^42428277 is an apocalyptic number.

It is an amenable number.

42428277 is a deficient number, since it is larger than the sum of its proper divisors (22462263).

42428277 is a wasteful number, since it uses less digits than its factorization.

42428277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277332 (or 277329 counting only the distinct ones).

The product of its digits is 50176, while the sum is 36.

The square root of 42428277 is about 6513.6991794218. The cubic root of 42428277 is about 348.7801808390.

The spelling of 42428277 in words is "forty-two million, four hundred twenty-eight thousand, two hundred seventy-seven".