42597217 has 8 divisors (see below), whose sum is σ = 45944360. Its totient is φ = 39260160.

The previous prime is 42597211. The next prime is 42597227. The reversal of 42597217 is 71279524.

It can be written as a sum of positive squares in 4 ways, for example, as 7834401 + 34762816 = 2799^2 + 5896^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42597217 is a prime.

It is a super-2 number, since 2×42597217² = 3629045792290178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42597211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7867 + ... + 12127.

It is an arithmetic number, because the mean of its divisors is an integer number (5743045).

Almost surely, 2^42597217 is an apocalyptic number.

It is an amenable number.

42597217 is a deficient number, since it is larger than the sum of its proper divisors (3347143).

42597217 is a wasteful number, since it uses less digits than its factorization.

42597217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5043.

The product of its digits is 35280, while the sum is 37.

The square root of 42597217 is about 6526.6543496649. The cubic root of 42597217 is about 349.2424895824.

It can be divided in two parts, 4259 and 7217, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 42597217 in words is "forty-two million, five hundred ninety-seven thousand, two hundred seventeen".