140247181 has 2 divisors, whose sum is σ = 140247182. Its totient is φ = 140247180.

The previous prime is 140247167. The next prime is 140247187. The reversal of 140247181 is 181742041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123965956 + 16281225 = 11134^2 + 4035^2 .

It is a cyclic number.

It is not a de Polignac number, because 140247181 - 2⁹ = 140246669 is a prime.

It is a super-2 number, since 2×140247181² = 39338543556893522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140247187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70123590 + 70123591.

It is an arithmetic number, because the mean of its divisors is an integer number (70123591).

Almost surely, 2^140247181 is an apocalyptic number.

It is an amenable number.

140247181 is a deficient number, since it is larger than the sum of its proper divisors (1).

140247181 is an equidigital number, since it uses as much as digits as its factorization.

140247181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 140247181 is about 11842.6002634557. The cubic root of 140247181 is about 519.5548223898.

The spelling of 140247181 in words is "one hundred forty million, two hundred forty-seven thousand, one hundred eighty-one".