42971709 has 8 divisors (see below), whose sum is σ = 62504352. Its totient is φ = 26043440.

The previous prime is 42971683. The next prime is 42971713. The reversal of 42971709 is 90717924.

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

It is a cyclic number.

It is not a de Polignac number, because 42971709 - 2¹⁵ = 42938941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42971729) 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, 651054 + ... + 651119.

It is an arithmetic number, because the mean of its divisors is an integer number (7813044).

Almost surely, 2^42971709 is an apocalyptic number.

It is an amenable number.

42971709 is a deficient number, since it is larger than the sum of its proper divisors (19532643).

42971709 is a wasteful number, since it uses less digits than its factorization.

42971709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302187.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 42971709 is about 6555.2810008420. The cubic root of 42971709 is about 350.2629561322.

It can be divided in two parts, 4297 and 1709, that added together give a palindrome (6006).

The spelling of 42971709 in words is "forty-two million, nine hundred seventy-one thousand, seven hundred nine".