39712421 has 8 divisors (see below), whose sum is σ = 47359104. Its totient is φ = 32559120.

The previous prime is 39712373. The next prime is 39712427. The reversal of 39712421 is 12421793.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39712421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39712427) 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, 123170 + ... + 123491.

It is an arithmetic number, because the mean of its divisors is an integer number (5919888).

Almost surely, 2^39712421 is an apocalyptic number.

It is an amenable number.

39712421 is a deficient number, since it is larger than the sum of its proper divisors (7646683).

39712421 is a wasteful number, since it uses less digits than its factorization.

39712421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246691.

The product of its digits is 3024, while the sum is 29.

The square root of 39712421 is about 6301.7791932120. The cubic root of 39712421 is about 341.1736286939.

The spelling of 39712421 in words is "thirty-nine million, seven hundred twelve thousand, four hundred twenty-one".