1261255364 has 24 divisors (see below), whose sum is σ = 2342662560. Its totient is φ = 592102016.

The previous prime is 1261255361. The next prime is 1261255417. The reversal of 1261255364 is 4635521621.

It is not an unprimeable number, because it can be changed into a prime (1261255361) 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, 6359 + ... + 50625.

It is an arithmetic number, because the mean of its divisors is an integer number (97610940).

Almost surely, 2^1261255364 is an apocalyptic number.

It is an amenable number.

1261255364 is a deficient number, since it is larger than the sum of its proper divisors (1081407196).

1261255364 is a wasteful number, since it uses less digits than its factorization.

1261255364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44707 (or 44705 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 1261255364 is about 35514.1572334189. The cubic root of 1261255364 is about 1080.4408819539.

Adding to 1261255364 its reverse (4635521621), we get a palindrome (5896776985).

It can be divided in two parts, 12612 and 55364, that added together give a palindrome (67976).

The spelling of 1261255364 in words is "one billion, two hundred sixty-one million, two hundred fifty-five thousand, three hundred sixty-four".