39242561 has 2 divisors, whose sum is σ = 39242562. Its totient is φ = 39242560.

The previous prime is 39242557. The next prime is 39242573. The reversal of 39242561 is 16524293.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38987536 + 255025 = 6244^2 + 505^2 .

It is an emirp because it is prime and its reverse (16524293) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39242561 - 2² = 39242557 is a prime.

It is a Chen prime.

It is equal to p_2390297 and since 39242561 and 2390297 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (39242501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19621280 + 19621281.

It is an arithmetic number, because the mean of its divisors is an integer number (19621281).

Almost surely, 2^39242561 is an apocalyptic number.

It is an amenable number.

39242561 is a deficient number, since it is larger than the sum of its proper divisors (1).

39242561 is an equidigital number, since it uses as much as digits as its factorization.

39242561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 39242561 is about 6264.3883181042. The cubic root of 39242561 is about 339.8227478630.

The spelling of 39242561 in words is "thirty-nine million, two hundred forty-two thousand, five hundred sixty-one".