1260405530 has 16 divisors (see below), whose sum is σ = 2270276424. Its totient is φ = 503818560.

The previous prime is 1260405529. The next prime is 1260405539. The reversal of 1260405530 is 355040621.

It can be written as a sum of positive squares in 4 ways, for example, as 1258759441 + 1646089 = 35479^2 + 1283^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1260405530.

It is not an unprimeable number, because it can be changed into a prime (1260405539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27281 + ... + 57140.

Almost surely, 2^1260405530 is an apocalyptic number.

1260405530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1260405530 is a deficient number, since it is larger than the sum of its proper divisors (1009870894).

1260405530 is a wasteful number, since it uses less digits than its factorization.

1260405530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85921.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1260405530 is about 35502.1904957990. The cubic root of 1260405530 is about 1080.1981603696.

The spelling of 1260405530 in words is "one billion, two hundred sixty million, four hundred five thousand, five hundred thirty".