42123571 has 8 divisors (see below), whose sum is σ = 48449120. Its totient is φ = 35875008.

The previous prime is 42123559. The next prime is 42123577. The reversal of 42123571 is 17532124.

It is a happy number.

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 42123571 - 2²¹ = 40026419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42123577) 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, 18066 + ... + 20263.

It is an arithmetic number, because the mean of its divisors is an integer number (6056140).

Almost surely, 2^42123571 is an apocalyptic number.

42123571 is a deficient number, since it is larger than the sum of its proper divisors (6325549).

42123571 is a wasteful number, since it uses less digits than its factorization.

42123571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38493.

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

The square root of 42123571 is about 6490.2674058932. The cubic root of 42123571 is about 347.9432323618.

Adding to 42123571 its reverse (17532124), we get a palindrome (59655695).

The spelling of 42123571 in words is "forty-two million, one hundred twenty-three thousand, five hundred seventy-one".