39421745 has 16 divisors (see below), whose sum is σ = 52071552. Its totient is φ = 28412160.

The previous prime is 39421741. The next prime is 39421757. The reversal of 39421745 is 54712493.

It is not a de Polignac number, because 39421745 - 2² = 39421741 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39421741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3044 + ... + 9386.

It is an arithmetic number, because the mean of its divisors is an integer number (3254472).

Almost surely, 2^39421745 is an apocalyptic number.

It is an amenable number.

39421745 is a deficient number, since it is larger than the sum of its proper divisors (12649807).

39421745 is a wasteful number, since it uses less digits than its factorization.

39421745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6472.

The product of its digits is 30240, while the sum is 35.

The square root of 39421745 is about 6278.6738249411. The cubic root of 39421745 is about 340.3391799800.

The spelling of 39421745 in words is "thirty-nine million, four hundred twenty-one thousand, seven hundred forty-five".