140520252 has 12 divisors (see below), whose sum is σ = 327880616. Its totient is φ = 46840080.

The previous prime is 140520251. The next prime is 140520277. The reversal of 140520252 is 252025041.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140520251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5854999 + ... + 5855022.

Almost surely, 2^140520252 is an apocalyptic number.

140520252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

140520252 is an abundant number, since it is smaller than the sum of its proper divisors (187360364).

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

140520252 is a wasteful number, since it uses less digits than its factorization.

140520252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11710028 (or 11710026 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 140520252 is about 11854.1238394071. The cubic root of 140520252 is about 519.8918068791.

Adding to 140520252 its reverse (252025041), we get a palindrome (392545293).

The spelling of 140520252 in words is "one hundred forty million, five hundred twenty thousand, two hundred fifty-two".