1261368794 has 32 divisors (see below), whose sum is σ = 2235547776. Its totient is φ = 522547200.

The previous prime is 1261368793. The next prime is 1261368799. The reversal of 1261368794 is 4978631621.

It is not an unprimeable number, because it can be changed into a prime (1261368793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47594 + ... + 69194.

It is an arithmetic number, because the mean of its divisors is an integer number (69860868).

Almost surely, 2^1261368794 is an apocalyptic number.

1261368794 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1261368794 is a deficient number, since it is larger than the sum of its proper divisors (974178982).

1261368794 is a wasteful number, since it uses less digits than its factorization.

1261368794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21750.

The product of its digits is 435456, while the sum is 47.

The square root of 1261368794 is about 35515.7541662851. The cubic root of 1261368794 is about 1080.4732705140.

The spelling of 1261368794 in words is "one billion, two hundred sixty-one million, three hundred sixty-eight thousand, seven hundred ninety-four".