42424645 has 8 divisors (see below), whose sum is σ = 51870456. Its totient is φ = 33299136.

The previous prime is 42424631. The next prime is 42424661. The reversal of 42424645 is 54642424.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 408321 + 42016324 = 639^2 + 6482^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42424645 - 2⁷ = 42424517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79782 + ... + 80311.

It is an arithmetic number, because the mean of its divisors is an integer number (6483807).

Almost surely, 2^42424645 is an apocalyptic number.

It is an amenable number.

42424645 is a deficient number, since it is larger than the sum of its proper divisors (9445811).

42424645 is a wasteful number, since it uses less digits than its factorization.

42424645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160151.

The product of its digits is 30720, while the sum is 31.

The square root of 42424645 is about 6513.4203764228. The cubic root of 42424645 is about 348.7702283116.

The spelling of 42424645 in words is "forty-two million, four hundred twenty-four thousand, six hundred forty-five".