39540425 has 12 divisors (see below), whose sum is σ = 51611280. Its totient is φ = 29967120.

The previous prime is 39540421. The next prime is 39540437. The reversal of 39540425 is 52404593.

It is a happy number.

It is not a de Polignac number, because 39540425 - 2² = 39540421 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 39540391 and 39540400.

It is not an unprimeable number, because it can be changed into a prime (39540421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41147 + ... + 42096.

It is an arithmetic number, because the mean of its divisors is an integer number (4300940).

Almost surely, 2^39540425 is an apocalyptic number.

It is an amenable number.

39540425 is a deficient number, since it is larger than the sum of its proper divisors (12070855).

39540425 is a wasteful number, since it uses less digits than its factorization.

39540425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83272 (or 83267 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 39540425 is about 6288.1177628922. The cubic root of 39540425 is about 340.6803705964.

The spelling of 39540425 in words is "thirty-nine million, five hundred forty thousand, four hundred twenty-five".