42052140 has 72 divisors (see below), whose sum is σ = 137377968. Its totient is φ = 10350720.

The previous prime is 42052079. The next prime is 42052147. The reversal of 42052140 is 4125024.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (42052147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6646 + ... + 11325.

Almost surely, 2^42052140 is an apocalyptic number.

It is an amenable number.

42052140 is an abundant number, since it is smaller than the sum of its proper divisors (95325828).

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

42052140 is a wasteful number, since it uses less digits than its factorization.

42052140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17999 (or 17994 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 42052140 is about 6484.7621390457. The cubic root of 42052140 is about 347.7464462998.

Adding to 42052140 its reverse (4125024), we get a palindrome (46177164).

The spelling of 42052140 in words is "forty-two million, fifty-two thousand, one hundred forty".