39942241 has 6 divisors (see below), whose sum is σ = 40941926. Its totient is φ = 38966400.

The previous prime is 39942179. The next prime is 39942263. The reversal of 39942241 is 14224993.

It can be written as a sum of positive squares in 3 ways, for example, as 817216 + 39125025 = 904^2 + 6255^2 .

It is not a de Polignac number, because 39942241 - 2⁷ = 39942113 is a prime.

It is a super-2 number, since 2×39942241² = 3190765232204162, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39942197 and 39942206.

It is not an unprimeable number, because it can be changed into a prime (39946241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10200 + ... + 13561.

Almost surely, 2^39942241 is an apocalyptic number.

It is an amenable number.

39942241 is a deficient number, since it is larger than the sum of its proper divisors (999685).

39942241 is an equidigital number, since it uses as much as digits as its factorization.

39942241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23843 (or 23802 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 39942241 is about 6319.9874208736. The cubic root of 39942241 is about 341.8304992059.

The spelling of 39942241 in words is "thirty-nine million, nine hundred forty-two thousand, two hundred forty-one".