140520135 has 32 divisors (see below), whose sum is σ = 257674752. Its totient is φ = 64056960.

The previous prime is 140520097. The next prime is 140520137. The reversal of 140520135 is 531025041.

It is not a de Polignac number, because 140520135 - 2⁶ = 140520071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140520137) 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 31 ways as a sum of consecutive naturals, for example, 40000 + ... + 43370.

It is an arithmetic number, because the mean of its divisors is an integer number (8052336).

Almost surely, 2^140520135 is an apocalyptic number.

140520135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

140520135 is a deficient number, since it is larger than the sum of its proper divisors (117154617).

140520135 is a wasteful number, since it uses less digits than its factorization.

140520135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3783.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 140520135 is about 11854.1189044146. The cubic root of 140520135 is about 519.8916625882.

Adding to 140520135 its reverse (531025041), we get a palindrome (671545176).

The spelling of 140520135 in words is "one hundred forty million, five hundred twenty thousand, one hundred thirty-five".