142005744 has 80 divisors (see below), whose sum is σ = 411357600. Its totient is φ = 46900224.

The previous prime is 142005727. The next prime is 142005767. The reversal of 142005744 is 447500241.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 47362 + ... + 50270.

It is an arithmetic number, because the mean of its divisors is an integer number (5141970).

Almost surely, 2^142005744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142005744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205678800).

142005744 is an abundant number, since it is smaller than the sum of its proper divisors (269351856).

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

142005744 is a wasteful number, since it uses less digits than its factorization.

142005744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3039 (or 3027 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 142005744 is about 11916.6162982619. The cubic root of 142005744 is about 521.7173790497.

Adding to 142005744 its reverse (447500241), we get a palindrome (589505985).

The spelling of 142005744 in words is "one hundred forty-two million, five thousand, seven hundred forty-four".