42520345 has 8 divisors (see below), whose sum is σ = 58313664. Its totient is φ = 29156784.

The previous prime is 42520337. The next prime is 42520367. The reversal of 42520345 is 54302524.

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 42520345 - 2³ = 42520337 is a prime.

It is a Duffinian 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, 607399 + ... + 607468.

It is an arithmetic number, because the mean of its divisors is an integer number (7289208).

Almost surely, 2^42520345 is an apocalyptic number.

It is an amenable number.

42520345 is a deficient number, since it is larger than the sum of its proper divisors (15793319).

42520345 is a wasteful number, since it uses less digits than its factorization.

42520345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214879.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 42520345 is about 6520.7626087751. The cubic root of 42520345 is about 349.0322791796.

Adding to 42520345 its reverse (54302524), we get a palindrome (96822869).

The spelling of 42520345 in words is "forty-two million, five hundred twenty thousand, three hundred forty-five".