140256534 has 16 divisors (see below), whose sum is σ = 306014400. Its totient is φ = 42501960.

The previous prime is 140256533. The next prime is 140256539. The reversal of 140256534 is 435652041.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140256533) 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 7 ways as a sum of consecutive naturals, for example, 1062484 + ... + 1062615.

It is an arithmetic number, because the mean of its divisors is an integer number (19125900).

Almost surely, 2^140256534 is an apocalyptic number.

140256534 is an abundant number, since it is smaller than the sum of its proper divisors (165757866).

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

140256534 is a wasteful number, since it uses less digits than its factorization.

140256534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125115.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 140256534 is about 11842.9951448103. The cubic root of 140256534 is about 519.5663717324.

The spelling of 140256534 in words is "one hundred forty million, two hundred fifty-six thousand, five hundred thirty-four".