1261260344 has 16 divisors (see below), whose sum is σ = 2446410600. Its totient is φ = 608884192.

The previous prime is 1261260317. The next prime is 1261260349. The reversal of 1261260344 is 4430621621.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261260349) 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, 2718002 + ... + 2718465.

Almost surely, 2^1261260344 is an apocalyptic number.

It is an amenable number.

1261260344 is a deficient number, since it is larger than the sum of its proper divisors (1185150256).

1261260344 is a wasteful number, since it uses less digits than its factorization.

1261260344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5436502 (or 5436498 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 1261260344 is about 35514.2273462341. The cubic root of 1261260344 is about 1080.4423039732.

Adding to 1261260344 its reverse (4430621621), we get a palindrome (5691881965).

The spelling of 1261260344 in words is "one billion, two hundred sixty-one million, two hundred sixty thousand, three hundred forty-four".