42417385 has 4 divisors (see below), whose sum is σ = 50900868. Its totient is φ = 33933904.

The previous prime is 42417383. The next prime is 42417409. The reversal of 42417385 is 58371424.

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 29800681 + 12616704 = 5459^2 + 3552^2 .

It is a cyclic number.

It is not a de Polignac number, because 42417385 - 2¹ = 42417383 is a prime.

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 42417385.

It is not an unprimeable number, because it can be changed into a prime (42417383) 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, 4241734 + ... + 4241743.

It is an arithmetic number, because the mean of its divisors is an integer number (12725217).

Almost surely, 2^42417385 is an apocalyptic number.

It is an amenable number.

42417385 is a deficient number, since it is larger than the sum of its proper divisors (8483483).

42417385 is an equidigital number, since it uses as much as digits as its factorization.

42417385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8483482.

The product of its digits is 26880, while the sum is 34.

The square root of 42417385 is about 6512.8630417045. The cubic root of 42417385 is about 348.7503325151.

The spelling of 42417385 in words is "forty-two million, four hundred seventeen thousand, three hundred eighty-five".