42473421 has 6 divisors (see below), whose sum is σ = 61350510. Its totient is φ = 28315608.

The previous prime is 42473419. The next prime is 42473443. The reversal of 42473421 is 12437424.

It can be written as a sum of positive squares in only one way, i.e., 41139396 + 1334025 = 6414^2 + 1155^2 .

It is not a de Polignac number, because 42473421 - 2¹ = 42473419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42473401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2359626 + ... + 2359643.

It is an arithmetic number, because the mean of its divisors is an integer number (10225085).

Almost surely, 2^42473421 is an apocalyptic number.

It is an amenable number.

42473421 is a deficient number, since it is larger than the sum of its proper divisors (18877089).

42473421 is a wasteful number, since it uses less digits than its factorization.

42473421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4719275 (or 4719272 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 42473421 is about 6517.1635701431. The cubic root of 42473421 is about 348.9038385543.

The spelling of 42473421 in words is "forty-two million, four hundred seventy-three thousand, four hundred twenty-one".