1244770249 has 4 divisors (see below), whose sum is σ = 1284924160. Its totient is φ = 1204616340.

The previous prime is 1244770223. The next prime is 1244770271. The reversal of 1244770249 is 9420774421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9420774421 = 17137 ⋅549733.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244770249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244770049) 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, 20076909 + ... + 20076970.

It is an arithmetic number, because the mean of its divisors is an integer number (321231040).

Almost surely, 2^1244770249 is an apocalyptic number.

It is an amenable number.

1244770249 is a deficient number, since it is larger than the sum of its proper divisors (40153911).

1244770249 is an equidigital number, since it uses as much as digits as its factorization.

1244770249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40153910.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 1244770249 is about 35281.3016908390. The cubic root of 1244770249 is about 1075.7129574453.

The spelling of 1244770249 in words is "one billion, two hundred forty-four million, seven hundred seventy thousand, two hundred forty-nine".