140651111 has 2 divisors, whose sum is σ = 140651112. Its totient is φ = 140651110.

The previous prime is 140651107. The next prime is 140651201. The reversal of 140651111 is 111156041.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140651111 - 2² = 140651107 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140651101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70325555 + 70325556.

It is an arithmetic number, because the mean of its divisors is an integer number (70325556).

Almost surely, 2^140651111 is an apocalyptic number.

140651111 is a deficient number, since it is larger than the sum of its proper divisors (1).

140651111 is an equidigital number, since it uses as much as digits as its factorization.

140651111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 140651111 is about 11859.6421109576. The cubic root of 140651111 is about 520.0531392933.

It can be divided in two parts, 1406 and 51111, that multiplied together give a triangular number (71862066 = T₁₁₉₈₈).

The spelling of 140651111 in words is "one hundred forty million, six hundred fifty-one thousand, one hundred eleven".