1279244661 has 8 divisors (see below), whose sum is σ = 1717931040. Its totient is φ = 846694032.

The previous prime is 1279244651. The next prime is 1279244671. The reversal of 1279244661 is 1664429721.

It is an interprime number because it is at equal distance from previous prime (1279244651) and next prime (1279244671).

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

It is not a de Polignac number, because 1279244661 - 2⁹ = 1279244149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279244621) 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 7 ways as a sum of consecutive naturals, for example, 1533450 + ... + 1534283.

It is an arithmetic number, because the mean of its divisors is an integer number (214741380).

Almost surely, 2^1279244661 is an apocalyptic number.

It is an amenable number.

1279244661 is a deficient number, since it is larger than the sum of its proper divisors (438686379).

1279244661 is a wasteful number, since it uses less digits than its factorization.

1279244661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3067875.

The product of its digits is 145152, while the sum is 42.

The square root of 1279244661 is about 35766.5298987755. The cubic root of 1279244661 is about 1085.5534311253.

The spelling of 1279244661 in words is "one billion, two hundred seventy-nine million, two hundred forty-four thousand, six hundred sixty-one".