1261312426 has 8 divisors (see below), whose sum is σ = 2063965824. Its totient is φ = 573323820.

The previous prime is 1261312417. The next prime is 1261312427. The reversal of 1261312426 is 6242131621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1261312394 and 1261312403.

It is not an unprimeable number, because it can be changed into a prime (1261312427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28666170 + ... + 28666213.

It is an arithmetic number, because the mean of its divisors is an integer number (257995728).

Almost surely, 2^1261312426 is an apocalyptic number.

1261312426 is a deficient number, since it is larger than the sum of its proper divisors (802653398).

1261312426 is a wasteful number, since it uses less digits than its factorization.

1261312426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57332396.

The product of its digits is 3456, while the sum is 28.

The square root of 1261312426 is about 35514.9605940933. The cubic root of 1261312426 is about 1080.4571755583.

The spelling of 1261312426 in words is "one billion, two hundred sixty-one million, three hundred twelve thousand, four hundred twenty-six".