140256247 has 2 divisors, whose sum is σ = 140256248. Its totient is φ = 140256246.

The previous prime is 140256241. The next prime is 140256251. The reversal of 140256247 is 742652041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140256247 - 2²³ = 131867639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140256241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70128123 + 70128124.

It is an arithmetic number, because the mean of its divisors is an integer number (70128124).

Almost surely, 2^140256247 is an apocalyptic number.

140256247 is a deficient number, since it is larger than the sum of its proper divisors (1).

140256247 is an equidigital number, since it uses as much as digits as its factorization.

140256247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 140256247 is about 11842.9830279368. The cubic root of 140256247 is about 519.5660173445.

The spelling of 140256247 in words is "one hundred forty million, two hundred fifty-six thousand, two hundred forty-seven".