39042457 has 2 divisors, whose sum is σ = 39042458. Its totient is φ = 39042456.

The previous prime is 39042389. The next prime is 39042463. The reversal of 39042457 is 75424093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22240656 + 16801801 = 4716^2 + 4099^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39042457 is a prime.

It is not a weakly prime, because it can be changed into another prime (39052457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19521228 + 19521229.

It is an arithmetic number, because the mean of its divisors is an integer number (19521229).

Almost surely, 2^39042457 is an apocalyptic number.

It is an amenable number.

39042457 is a deficient number, since it is larger than the sum of its proper divisors (1).

39042457 is an equidigital number, since it uses as much as digits as its factorization.

39042457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 39042457 is about 6248.3963542656. The cubic root of 39042457 is about 339.2441600690.

The spelling of 39042457 in words is "thirty-nine million, forty-two thousand, four hundred fifty-seven".