42345540 has 72 divisors (see below), whose sum is σ = 131459328. Its totient is φ = 11027520.

The previous prime is 42345491. The next prime is 42345587. The reversal of 42345540 is 4554324.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5005 + ... + 10475.

It is an arithmetic number, because the mean of its divisors is an integer number (1825824).

Almost surely, 2^42345540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42345540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65729664).

42345540 is an abundant number, since it is smaller than the sum of its proper divisors (89113788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42345540 is a wasteful number, since it uses less digits than its factorization.

42345540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5529 (or 5524 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 42345540 is about 6507.3450807530. The cubic root of 42345540 is about 348.5533210990.

Adding to 42345540 its reverse (4554324), we get a palindrome (46899864).

The spelling of 42345540 in words is "forty-two million, three hundred forty-five thousand, five hundred forty".