1261482979 has 8 divisors (see below), whose sum is σ = 1328418000. Its totient is φ = 1194602112.

The previous prime is 1261482973. The next prime is 1261483007. The reversal of 1261482979 is 9792841621.

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

It is a cyclic number.

It is not a de Polignac number, because 1261482979 - 2¹⁹ = 1260958691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261482973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39687 + ... + 64015.

It is an arithmetic number, because the mean of its divisors is an integer number (166052250).

Almost surely, 2^1261482979 is an apocalyptic number.

1261482979 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1261482979 is a deficient number, since it is larger than the sum of its proper divisors (66935021).

1261482979 is a wasteful number, since it uses less digits than its factorization.

1261482979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27077.

The product of its digits is 435456, while the sum is 49.

The square root of 1261482979 is about 35517.3616559564. The cubic root of 1261482979 is about 1080.5058726941.

The spelling of 1261482979 in words is "one billion, two hundred sixty-one million, four hundred eighty-two thousand, nine hundred seventy-nine".