140245591 has 2 divisors, whose sum is σ = 140245592. Its totient is φ = 140245590.

The previous prime is 140245549. The next prime is 140245601. The reversal of 140245591 is 195542041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140245591 - 2¹⁵ = 140212823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140245991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70122795 + 70122796.

It is an arithmetic number, because the mean of its divisors is an integer number (70122796).

Almost surely, 2^140245591 is an apocalyptic number.

140245591 is a deficient number, since it is larger than the sum of its proper divisors (1).

140245591 is an equidigital number, since it uses as much as digits as its factorization.

140245591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 140245591 is about 11842.5331327381. The cubic root of 140245591 is about 519.5528589628.

The spelling of 140245591 in words is "one hundred forty million, two hundred forty-five thousand, five hundred ninety-one".