142005240 has 192 divisors, whose sum is σ = 523504800. Its totient is φ = 33094656.

The previous prime is 142005229. The next prime is 142005247. The reversal of 142005240 is 42500241.

142005240 is a `hidden beast` number, since 1 + 420 + 0 + 5 + 240 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142005247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 88122 + ... + 89718.

Almost surely, 2^142005240 is an apocalyptic number.

142005240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142005240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261752400).

142005240 is an abundant number, since it is smaller than the sum of its proper divisors (381499560).

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

142005240 is a wasteful number, since it uses less digits than its factorization.

142005240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646 (or 1639 counting only the distinct ones).

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

The square root of 142005240 is about 11916.5951513006. The cubic root of 142005240 is about 521.7167618309.

Adding to 142005240 its reverse (42500241), we get a palindrome (184505481).

The spelling of 142005240 in words is "one hundred forty-two million, five thousand, two hundred forty".