42003240 has 64 divisors (see below), whose sum is σ = 126437760. Its totient is φ = 11162880.

The previous prime is 42003239. The next prime is 42003253. The reversal of 42003240 is 4230024.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64597 + ... + 65243.

It is an arithmetic number, because the mean of its divisors is an integer number (1975590).

Almost surely, 2^42003240 is an apocalyptic number.

42003240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42003240 is an abundant number, since it is smaller than the sum of its proper divisors (84434520).

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

42003240 is a wasteful number, since it uses less digits than its factorization.

42003240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202 (or 1198 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 42003240 is about 6480.9906650141. The cubic root of 42003240 is about 347.6116026130.

Adding to 42003240 its reverse (4230024), we get a palindrome (46233264).

The spelling of 42003240 in words is "forty-two million, three thousand, two hundred forty".