140512155 has 24 divisors (see below), whose sum is σ = 261526032. Its totient is φ = 64233792.

The previous prime is 140512139. The next prime is 140512159. The reversal of 140512155 is 551215041.

It is not a de Polignac number, because 140512155 - 2⁴ = 140512139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140512159) 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 23 ways as a sum of consecutive naturals, for example, 94852 + ... + 96321.

It is an arithmetic number, because the mean of its divisors is an integer number (10896918).

Almost surely, 2^140512155 is an apocalyptic number.

140512155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

140512155 is a deficient number, since it is larger than the sum of its proper divisors (121013877).

140512155 is a wasteful number, since it uses less digits than its factorization.

140512155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191195 (or 191188 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 140512155 is about 11853.7823077700. The cubic root of 140512155 is about 519.8818210235.

Adding to 140512155 its reverse (551215041), we get a palindrome (691727196).

The spelling of 140512155 in words is "one hundred forty million, five hundred twelve thousand, one hundred fifty-five".