42470431 has 4 divisors (see below), whose sum is σ = 42495552. Its totient is φ = 42445312.

The previous prime is 42470423. The next prime is 42470459. The reversal of 42470431 is 13407424.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42470431 - 2³ = 42470423 is a prime.

It is a super-2 number, since 2×42470431² = 3607475018651522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42470396 and 42470405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42470231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9826 + ... + 13471.

It is an arithmetic number, because the mean of its divisors is an integer number (10623888).

Almost surely, 2^42470431 is an apocalyptic number.

42470431 is a deficient number, since it is larger than the sum of its proper divisors (25121).

42470431 is a wasteful number, since it uses less digits than its factorization.

42470431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25120.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 42470431 is about 6516.9341718326. The cubic root of 42470431 is about 348.8956511049.

Adding to 42470431 its reverse (13407424), we get a palindrome (55877855).

The spelling of 42470431 in words is "forty-two million, four hundred seventy thousand, four hundred thirty-one".