42115530 has 64 divisors (see below), whose sum is σ = 107163648. Its totient is φ = 10570560.

The previous prime is 42115523. The next prime is 42115543. The reversal of 42115530 is 3551124.

It is a junction number, because it is equal to n+sod(n) for n = 42115497 and 42115506.

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, 45775 + ... + 46685.

It is an arithmetic number, because the mean of its divisors is an integer number (1674432).

Almost surely, 2^42115530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42115530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53581824).

42115530 is an abundant number, since it is smaller than the sum of its proper divisors (65048118).

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

42115530 is a wasteful number, since it uses less digits than its factorization.

42115530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 42115530 is about 6489.6479103261. The cubic root of 42115530 is about 347.9210912382.

Adding to 42115530 its reverse (3551124), we get a palindrome (45666654).

It can be divided in two parts, 421 and 15530, that added together give a palindrome (15951).

The spelling of 42115530 in words is "forty-two million, one hundred fifteen thousand, five hundred thirty".