101440249 has 4 divisors (see below), whose sum is σ = 101696164. Its totient is φ = 101184336.

The previous prime is 101440201. The next prime is 101440253. The reversal of 101440249 is 942044101.

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 70560000 + 30880249 = 8400^2 + 5557^2 .

It is a cyclic number.

It is not a de Polignac number, because 101440249 - 2⁷ = 101440121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101440049) 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, 127362 + ... + 128155.

It is an arithmetic number, because the mean of its divisors is an integer number (25424041).

Almost surely, 2^101440249 is an apocalyptic number.

It is an amenable number.

101440249 is a deficient number, since it is larger than the sum of its proper divisors (255915).

101440249 is an equidigital number, since it uses as much as digits as its factorization.

101440249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255914.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 101440249 is about 10071.7550109204. The cubic root of 101440249 is about 466.3766181187.

The spelling of 101440249 in words is "one hundred one million, four hundred forty thousand, two hundred forty-nine".