42113640 has 32 divisors (see below), whose sum is σ = 126341280. Its totient is φ = 11230272.

The previous prime is 42113639. The next prime is 42113651. The reversal of 42113640 is 4631124.

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, 175354 + ... + 175593.

It is an arithmetic number, because the mean of its divisors is an integer number (3948165).

Almost surely, 2^42113640 is an apocalyptic number.

42113640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42113640 is an abundant number, since it is smaller than the sum of its proper divisors (84227640).

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

42113640 is a wasteful number, since it uses less digits than its factorization.

42113640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350961 (or 350957 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 42113640 is about 6489.5022921639. The cubic root of 42113640 is about 347.9158866601.

Adding to 42113640 its reverse (4631124), we get a palindrome (46744764).

The spelling of 42113640 in words is "forty-two million, one hundred thirteen thousand, six hundred forty".