42171532 has 24 divisors (see below), whose sum is σ = 82044032. Its totient is φ = 18835200.

The previous prime is 42171529. The next prime is 42171533. The reversal of 42171532 is 23517124.

It is a happy number.

It is a super-2 number, since 2×42171532² = 3556876222454048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42171497 and 42171506.

It is not an unprimeable number, because it can be changed into a prime (42171533) 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, 11469 + ... + 14692.

Almost surely, 2^42171532 is an apocalyptic number.

It is an amenable number.

42171532 is a deficient number, since it is larger than the sum of its proper divisors (39872500).

42171532 is a wasteful number, since it uses less digits than its factorization.

42171532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26209 (or 26207 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 42171532 is about 6493.9611948332. The cubic root of 42171532 is about 348.0752358581.

Adding to 42171532 its reverse (23517124), we get a palindrome (65688656).

The spelling of 42171532 in words is "forty-two million, one hundred seventy-one thousand, five hundred thirty-two".