42493457 has 2 divisors, whose sum is σ = 42493458. Its totient is φ = 42493456.

The previous prime is 42493453. The next prime is 42493513. The reversal of 42493457 is 75439424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26204161 + 16289296 = 5119^2 + 4036^2 .

It is a cyclic number.

It is not a de Polignac number, because 42493457 - 2² = 42493453 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42493457.

It is not a weakly prime, because it can be changed into another prime (42493453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21246728 + 21246729.

It is an arithmetic number, because the mean of its divisors is an integer number (21246729).

Almost surely, 2^42493457 is an apocalyptic number.

It is an amenable number.

42493457 is a deficient number, since it is larger than the sum of its proper divisors (1).

42493457 is an equidigital number, since it uses as much as digits as its factorization.

42493457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 38.

The square root of 42493457 is about 6518.7005606946. The cubic root of 42493457 is about 348.9586927682.

The spelling of 42493457 in words is "forty-two million, four hundred ninety-three thousand, four hundred fifty-seven".