1261460340 has 72 divisors (see below), whose sum is σ = 4373066880. Its totient is φ = 288333504.

The previous prime is 1261460329. The next prime is 1261460353. The reversal of 1261460340 is 430641621.

1261460340 is a `hidden beast` number, since 1 + 2 + 6 + 14 + 603 + 40 = 666.

It is a congruent number.

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, 499320 + ... + 501839.

It is an arithmetic number, because the mean of its divisors is an integer number (60737040).

Almost surely, 2^1261460340 is an apocalyptic number.

1261460340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1261460340 is an abundant number, since it is smaller than the sum of its proper divisors (3111606540).

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

1261460340 is a wasteful number, since it uses less digits than its factorization.

1261460340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001181 (or 1001176 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1261460340 is about 35517.0429512368. The cubic root of 1261460340 is about 1080.4994089476.

The spelling of 1261460340 in words is "one billion, two hundred sixty-one million, four hundred sixty thousand, three hundred forty".