42053240 has 32 divisors (see below), whose sum is σ = 100187280. Its totient is φ = 15831552.

The previous prime is 42053239. The next prime is 42053273. The reversal of 42053240 is 4235024.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 30242 + ... + 31601.

Almost surely, 2^42053240 is an apocalyptic number.

42053240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42053240 is an abundant number, since it is smaller than the sum of its proper divisors (58134040).

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

42053240 is a wasteful number, since it uses less digits than its factorization.

42053240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61871 (or 61867 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 42053240 is about 6484.8469527044. The cubic root of 42053240 is about 347.7494783909.

Adding to 42053240 its reverse (4235024), we get a palindrome (46288264).

The spelling of 42053240 in words is "forty-two million, fifty-three thousand, two hundred forty".