42470917 has 4 divisors (see below), whose sum is σ = 42883360. Its totient is φ = 42058476.

The previous prime is 42470893. The next prime is 42470921. The reversal of 42470917 is 71907424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42470917 - 2⁷ = 42470789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42470927) 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, 206067 + ... + 206272.

It is an arithmetic number, because the mean of its divisors is an integer number (10720840).

Almost surely, 2^42470917 is an apocalyptic number.

It is an amenable number.

42470917 is a deficient number, since it is larger than the sum of its proper divisors (412443).

42470917 is a wasteful number, since it uses less digits than its factorization.

42470917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412442.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 42470917 is about 6516.9714591979. The cubic root of 42470917 is about 348.8969819338.

The spelling of 42470917 in words is "forty-two million, four hundred seventy thousand, nine hundred seventeen".