1260550921 has 6 divisors (see below), whose sum is σ = 1466355210. Its totient is φ = 1080472176.

The previous prime is 1260550919. The next prime is 1260550927. The reversal of 1260550921 is 1290550621.

It can be written as a sum of positive squares in only one way, i.e., 948640000 + 311910921 = 30800^2 + 17661^2 .

It is not a de Polignac number, because 1260550921 - 2¹ = 1260550919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1260550927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12862716 + ... + 12862813.

It is an arithmetic number, because the mean of its divisors is an integer number (244392535).

Almost surely, 2^1260550921 is an apocalyptic number.

It is an amenable number.

1260550921 is a deficient number, since it is larger than the sum of its proper divisors (205804289).

1260550921 is an equidigital number, since it uses as much as digits as its factorization.

1260550921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25725543 (or 25725536 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1260550921 is about 35504.2380709684. The cubic root of 1260550921 is about 1080.2396933124.

The spelling of 1260550921 in words is "one billion, two hundred sixty million, five hundred fifty thousand, nine hundred twenty-one".