42028747 has 2 divisors, whose sum is σ = 42028748. Its totient is φ = 42028746.

The previous prime is 42028733. The next prime is 42028757. The reversal of 42028747 is 74782024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42028747 - 2⁷ = 42028619 is a prime.

It is not a weakly prime, because it can be changed into another prime (42028717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21014373 + 21014374.

It is an arithmetic number, because the mean of its divisors is an integer number (21014374).

Almost surely, 2^42028747 is an apocalyptic number.

42028747 is a deficient number, since it is larger than the sum of its proper divisors (1).

42028747 is an equidigital number, since it uses as much as digits as its factorization.

42028747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 42028747 is about 6482.9581982302. The cubic root of 42028747 is about 347.6819522256.

The spelling of 42028747 in words is "forty-two million, twenty-eight thousand, seven hundred forty-seven".