42434417 has 4 divisors (see below), whose sum is σ = 42513396. Its totient is φ = 42355440.

The previous prime is 42434411. The next prime is 42434419. The reversal of 42434417 is 71443424.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12666481 + 29767936 = 3559^2 + 5456^2 .

It is a cyclic number.

It is not a de Polignac number, because 42434417 - 2⁴ = 42434401 is a prime.

It is a super-2 number, since 2×42434417² = 3601359492259778, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42434417.

It is not an unprimeable number, because it can be changed into a prime (42434411) 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, 38678 + ... + 39759.

It is an arithmetic number, because the mean of its divisors is an integer number (10628349).

Almost surely, 2^42434417 is an apocalyptic number.

It is an amenable number.

42434417 is a deficient number, since it is larger than the sum of its proper divisors (78979).

42434417 is an equidigital number, since it uses as much as digits as its factorization.

42434417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78978.

The product of its digits is 10752, while the sum is 29.

The square root of 42434417 is about 6514.1704767376. The cubic root of 42434417 is about 348.7970045798.

The spelling of 42434417 in words is "forty-two million, four hundred thirty-four thousand, four hundred seventeen".