1244790561 has 16 divisors (see below), whose sum is σ = 1935536000. Its totient is φ = 711308304.

The previous prime is 1244790553. The next prime is 1244790563. The reversal of 1244790561 is 1650974421.

It is not a de Polignac number, because 1244790561 - 2³ = 1244790553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244790563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 603826 + ... + 605883.

It is an arithmetic number, because the mean of its divisors is an integer number (120971000).

Almost surely, 2^1244790561 is an apocalyptic number.

It is an amenable number.

1244790561 is a deficient number, since it is larger than the sum of its proper divisors (690745439).

1244790561 is an equidigital number, since it uses as much as digits as its factorization.

1244790561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209733 (or 1209719 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 1244790561 is about 35281.5895475246. The cubic root of 1244790561 is about 1075.7188085285.

The spelling of 1244790561 in words is "one billion, two hundred forty-four million, seven hundred ninety thousand, five hundred sixty-one".