101542249 has 2 divisors, whose sum is σ = 101542250. Its totient is φ = 101542248.

The previous prime is 101542229. The next prime is 101542291. The reversal of 101542249 is 942245101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85285225 + 16257024 = 9235^2 + 4032^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101542249 is a prime.

It is equal to p_5845150 and since 101542249 and 5845150 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (101542229) 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, 50771124 + 50771125.

It is an arithmetic number, because the mean of its divisors is an integer number (50771125).

Almost surely, 2^101542249 is an apocalyptic number.

It is an amenable number.

101542249 is a deficient number, since it is larger than the sum of its proper divisors (1).

101542249 is an equidigital number, since it uses as much as digits as its factorization.

101542249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 101542249 is about 10076.8174043197. The cubic root of 101542249 is about 466.5328824553.

It can be divided in two parts, 10154 and 2249, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 101542249 in words is "one hundred one million, five hundred forty-two thousand, two hundred forty-nine".