42971487 has 16 divisors (see below), whose sum is σ = 63694848. Its totient is φ = 25590240.

The previous prime is 42971479. The next prime is 42971501. The reversal of 42971487 is 78417924.

It is a happy number.

It is not a de Polignac number, because 42971487 - 2³ = 42971479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42971447) 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, 16563 + ... + 18980.

It is an arithmetic number, because the mean of its divisors is an integer number (3980928).

Almost surely, 2^42971487 is an apocalyptic number.

42971487 is a deficient number, since it is larger than the sum of its proper divisors (20723361).

42971487 is a wasteful number, since it uses less digits than its factorization.

42971487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35590.

The product of its digits is 112896, while the sum is 42.

The square root of 42971487 is about 6555.2640679076. The cubic root of 42971487 is about 350.2623529562.

The spelling of 42971487 in words is "forty-two million, nine hundred seventy-one thousand, four hundred eighty-seven".