42115620 has 96 divisors (see below), whose sum is σ = 123492096. Its totient is φ = 10713600.

The previous prime is 42115607. The next prime is 42115637. The reversal of 42115620 is 2651124.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135265 + ... + 135575.

It is an arithmetic number, because the mean of its divisors is an integer number (1286376).

Almost surely, 2^42115620 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 42115620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61746048).

42115620 is an abundant number, since it is smaller than the sum of its proper divisors (81376476).

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

42115620 is a wasteful number, since it uses less digits than its factorization.

42115620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 42115620 is about 6489.6548444428. The cubic root of 42115620 is about 347.9213390714.

Adding to 42115620 its reverse (2651124), we get a palindrome (44766744).

The spelling of 42115620 in words is "forty-two million, one hundred fifteen thousand, six hundred twenty".