42090471 has 12 divisors (see below), whose sum is σ = 60854872. Its totient is φ = 28033776.

The previous prime is 42090469. The next prime is 42090493. The reversal of 42090471 is 17409024.

It is a happy number.

It is not a de Polignac number, because 42090471 - 2¹ = 42090469 is a prime.

It is a super-3 number, since 3×42090471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42090401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14385 + ... + 17061.

Almost surely, 2^42090471 is an apocalyptic number.

42090471 is a deficient number, since it is larger than the sum of its proper divisors (18764401).

42090471 is a wasteful number, since it uses less digits than its factorization.

42090471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4430 (or 4427 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 42090471 is about 6487.7169327892. The cubic root of 42090471 is about 347.8520724828.

Adding to 42090471 its reverse (17409024), we get a palindrome (59499495).

The spelling of 42090471 in words is "forty-two million, ninety thousand, four hundred seventy-one".