140243252 has 6 divisors (see below), whose sum is σ = 245425698. Its totient is φ = 70121624.

The previous prime is 140243239. The next prime is 140243291. The reversal of 140243252 is 252342041.

It is a happy number.

140243252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 130965136 + 9278116 = 11444^2 + 3046^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17530403 + ... + 17530410.

It is an arithmetic number, because the mean of its divisors is an integer number (40904283).

Almost surely, 2^140243252 is an apocalyptic number.

It is an amenable number.

140243252 is a deficient number, since it is larger than the sum of its proper divisors (105182446).

140243252 is a wasteful number, since it uses less digits than its factorization.

140243252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35060817 (or 35060815 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 140243252 is about 11842.4343781167. The cubic root of 140243252 is about 519.5499705989.

Adding to 140243252 its reverse (252342041), we get a palindrome (392585293).

The spelling of 140243252 in words is "one hundred forty million, two hundred forty-three thousand, two hundred fifty-two".