1244420013 has 8 divisors (see below), whose sum is σ = 1659390048. Its totient is φ = 829531664.

The previous prime is 1244419963. The next prime is 1244420059. The reversal of 1244420013 is 3100244421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1244420013 - 2¹² = 1244415917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244428013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45895 + ... + 67787.

It is an arithmetic number, because the mean of its divisors is an integer number (207423756).

Almost surely, 2^1244420013 is an apocalyptic number.

It is an amenable number.

1244420013 is a deficient number, since it is larger than the sum of its proper divisors (414970035).

1244420013 is a wasteful number, since it uses less digits than its factorization.

1244420013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40843.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1244420013 is about 35276.3378626524. The cubic root of 1244420013 is about 1075.6120583050.

Adding to 1244420013 its reverse (3100244421), we get a palindrome (4344664434).

It can be divided in two parts, 12 and 44420013, that added together give a triangular number (44420025 = T₉₄₂₅).

The spelling of 1244420013 in words is "one billion, two hundred forty-four million, four hundred twenty thousand, thirteen".