140542187 has 2 divisors, whose sum is σ = 140542188. Its totient is φ = 140542186.

The previous prime is 140542177. The next prime is 140542201. The reversal of 140542187 is 781245041.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (781245041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140542187 - 2⁶ = 140542123 is a prime.

It is not a weakly prime, because it can be changed into another prime (140542117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70271093 + 70271094.

It is an arithmetic number, because the mean of its divisors is an integer number (70271094).

Almost surely, 2^140542187 is an apocalyptic number.

140542187 is a deficient number, since it is larger than the sum of its proper divisors (1).

140542187 is an equidigital number, since it uses as much as digits as its factorization.

140542187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 140542187 is about 11855.0490087557. The cubic root of 140542187 is about 519.9188569147.

The spelling of 140542187 in words is "one hundred forty million, five hundred forty-two thousand, one hundred eighty-seven".