1261943368 has 48 divisors (see below), whose sum is σ = 2854025280. Its totient is φ = 512359776.

The previous prime is 1261943357. The next prime is 1261943383. The reversal of 1261943368 is 8633491621.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10996 + ... + 51427.

It is an arithmetic number, because the mean of its divisors is an integer number (59458860).

Almost surely, 2^1261943368 is an apocalyptic number.

It is an amenable number.

1261943368 is an abundant number, since it is smaller than the sum of its proper divisors (1592081912).

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

1261943368 is a wasteful number, since it uses less digits than its factorization.

1261943368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62474 (or 62451 counting only the distinct ones).

The product of its digits is 186624, while the sum is 43.

The square root of 1261943368 is about 35523.8422471444. The cubic root of 1261943368 is about 1080.6373033257.

The spelling of 1261943368 in words is "one billion, two hundred sixty-one million, nine hundred forty-three thousand, three hundred sixty-eight".