39042257 has 8 divisors (see below), whose sum is σ = 40081512. Its totient is φ = 38016000.

The previous prime is 39042239. The next prime is 39042271. The reversal of 39042257 is 75224093.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3568321 + 35473936 = 1889^2 + 5956^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39042257 - 2⁶ = 39042193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39042457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2993 + ... + 9329.

It is an arithmetic number, because the mean of its divisors is an integer number (5010189).

Almost surely, 2^39042257 is an apocalyptic number.

It is an amenable number.

39042257 is a deficient number, since it is larger than the sum of its proper divisors (1039255).

39042257 is a wasteful number, since it uses less digits than its factorization.

39042257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6499.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 39042257 is about 6248.3803501387. The cubic root of 39042257 is about 339.2435807941.

The spelling of 39042257 in words is "thirty-nine million, forty-two thousand, two hundred fifty-seven".