140528249 has 2 divisors, whose sum is σ = 140528250. Its totient is φ = 140528248.

The previous prime is 140528231. The next prime is 140528251. The reversal of 140528249 is 942825041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134560000 + 5968249 = 11600^2 + 2443^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140528249 is a prime.

Together with 140528251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140524249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70264124 + 70264125.

It is an arithmetic number, because the mean of its divisors is an integer number (70264125).

Almost surely, 2^140528249 is an apocalyptic number.

It is an amenable number.

140528249 is a deficient number, since it is larger than the sum of its proper divisors (1).

140528249 is an equidigital number, since it uses as much as digits as its factorization.

140528249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 140528249 is about 11854.4611433840. The cubic root of 140528249 is about 519.9016690303.

The spelling of 140528249 in words is "one hundred forty million, five hundred twenty-eight thousand, two hundred forty-nine".