101642449 has 2 divisors, whose sum is σ = 101642450. Its totient is φ = 101642448.

The previous prime is 101642413. The next prime is 101642491. The reversal of 101642449 is 944246101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97614400 + 4028049 = 9880^2 + 2007^2 .

It is a cyclic number.

It is not a de Polignac number, because 101642449 - 2¹¹ = 101640401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101642449.

It is not a weakly prime, because it can be changed into another prime (101642249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50821224 + 50821225.

It is an arithmetic number, because the mean of its divisors is an integer number (50821225).

Almost surely, 2^101642449 is an apocalyptic number.

It is an amenable number.

101642449 is a deficient number, since it is larger than the sum of its proper divisors (1).

101642449 is an equidigital number, since it uses as much as digits as its factorization.

101642449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 101642449 is about 10081.7879862651. The cubic root of 101642449 is about 466.6862873270.

The spelling of 101642449 in words is "one hundred one million, six hundred forty-two thousand, four hundred forty-nine".