101085749 has 4 divisors (see below), whose sum is σ = 102086700. Its totient is φ = 100084800.

The previous prime is 101085731. The next prime is 101085799. The reversal of 101085749 is 947580101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77563249 + 23522500 = 8807^2 + 4850^2 .

It is a cyclic number.

It is not a de Polignac number, because 101085749 - 2⁸ = 101085493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101085799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500324 + ... + 500525.

It is an arithmetic number, because the mean of its divisors is an integer number (25521675).

Almost surely, 2^101085749 is an apocalyptic number.

It is an amenable number.

101085749 is a deficient number, since it is larger than the sum of its proper divisors (1000951).

101085749 is a wasteful number, since it uses less digits than its factorization.

101085749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000950.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 101085749 is about 10054.1408882112. The cubic root of 101085749 is about 465.8327068695.

It can be divided in two parts, 101085 and 749, that multiplied together give a triangular number (75712665 = T₁₂₃₀₅).

The spelling of 101085749 in words is "one hundred one million, eighty-five thousand, seven hundred forty-nine".