42102457 has 2 divisors, whose sum is σ = 42102458. Its totient is φ = 42102456.

The previous prime is 42102451. The next prime is 42102469. The reversal of 42102457 is 75420124.

42102457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36433296 + 5669161 = 6036^2 + 2381^2 .

It is a cyclic number.

It is not a de Polignac number, because 42102457 - 2¹⁵ = 42069689 is a prime.

It is not a weakly prime, because it can be changed into another prime (42102451) 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 as a sum of consecutive naturals, namely, 21051228 + 21051229.

It is an arithmetic number, because the mean of its divisors is an integer number (21051229).

Almost surely, 2^42102457 is an apocalyptic number.

It is an amenable number.

42102457 is a deficient number, since it is larger than the sum of its proper divisors (1).

42102457 is an equidigital number, since it uses as much as digits as its factorization.

42102457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 42102457 is about 6488.6406126399. The cubic root of 42102457 is about 347.8850883423.

The spelling of 42102457 in words is "forty-two million, one hundred two thousand, four hundred fifty-seven".