42124457 has 2 divisors, whose sum is σ = 42124458. Its totient is φ = 42124456.

The previous prime is 42124451. The next prime is 42124469. The reversal of 42124457 is 75442124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25240576 + 16883881 = 5024^2 + 4109^2 .

It is a cyclic number.

It is not a de Polignac number, because 42124457 - 2¹⁶ = 42058921 is a prime.

It is not a weakly prime, because it can be changed into another prime (42124451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21062228 + 21062229.

It is an arithmetic number, because the mean of its divisors is an integer number (21062229).

Almost surely, 2^42124457 is an apocalyptic number.

It is an amenable number.

42124457 is a deficient number, since it is larger than the sum of its proper divisors (1).

42124457 is an equidigital number, since it uses as much as digits as its factorization.

42124457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 29.

The square root of 42124457 is about 6490.3356615818. The cubic root of 42124457 is about 347.9456718158.

The spelling of 42124457 in words is "forty-two million, one hundred twenty-four thousand, four hundred fifty-seven".