1261146330 has 48 divisors (see below), whose sum is σ = 3332748744. Its totient is φ = 330791040.

The previous prime is 1261146329. The next prime is 1261146379. The reversal of 1261146330 is 336411621.

1261146330 is a `hidden beast` number, since 1 + 2 + 611 + 46 + 3 + 3 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 947962521 + 313183809 = 30789^2 + 17697^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1261146294 and 1261146303.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109369 + ... + 120348.

Almost surely, 2^1261146330 is an apocalyptic number.

1261146330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1261146330 is an abundant number, since it is smaller than the sum of its proper divisors (2071602414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261146330 is a wasteful number, since it uses less digits than its factorization.

1261146330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229791 (or 229788 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1261146330 is about 35512.6221222821. The cubic root of 1261146330 is about 1080.4097467878.

Adding to 1261146330 its reverse (336411621), we get a palindrome (1597557951).

The spelling of 1261146330 in words is "one billion, two hundred sixty-one million, one hundred forty-six thousand, three hundred thirty".