140542144 has 56 divisors (see below), whose sum is σ = 292900608. Its totient is φ = 66781440.

The previous prime is 140542123. The next prime is 140542147. The reversal of 140542144 is 441245041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140542147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451749 + ... + 452059.

It is an arithmetic number, because the mean of its divisors is an integer number (5230368).

Almost surely, 2^140542144 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 140542144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146450304).

140542144 is an abundant number, since it is smaller than the sum of its proper divisors (152358464).

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

140542144 is a wasteful number, since it uses less digits than its factorization.

140542144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 140542144 is about 11855.0471951823. The cubic root of 140542144 is about 519.9188038902.

Adding to 140542144 its reverse (441245041), we get a palindrome (581787185).

The spelling of 140542144 in words is "one hundred forty million, five hundred forty-two thousand, one hundred forty-four".