42109473 has 12 divisors (see below), whose sum is σ = 65312880. Its totient is φ = 24062472.

The previous prime is 42109451. The next prime is 42109511. The reversal of 42109473 is 37490124.

It is a happy number.

It is not a de Polignac number, because 42109473 - 2⁶ = 42109409 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42109473.

It is not an unprimeable number, because it can be changed into a prime (42109423) 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, 143083 + ... + 143376.

It is an arithmetic number, because the mean of its divisors is an integer number (5442740).

Almost surely, 2^42109473 is an apocalyptic number.

It is an amenable number.

42109473 is a deficient number, since it is larger than the sum of its proper divisors (23203407).

42109473 is a wasteful number, since it uses less digits than its factorization.

42109473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286476 (or 286469 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 42109473 is about 6489.1812272428. The cubic root of 42109473 is about 347.9044112543.

Adding to 42109473 its reverse (37490124), we get a palindrome (79599597).

The spelling of 42109473 in words is "forty-two million, one hundred nine thousand, four hundred seventy-three".