1279081421 has 8 divisors (see below), whose sum is σ = 1322124288. Its totient is φ = 1236150000.

The previous prime is 1279081417. The next prime is 1279081439. The reversal of 1279081421 is 1241809721.

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 1279081421 - 2² = 1279081417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279081471) 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, 4190 + ... + 50751.

It is an arithmetic number, because the mean of its divisors is an integer number (165265536).

Almost surely, 2^1279081421 is an apocalyptic number.

It is an amenable number.

1279081421 is a deficient number, since it is larger than the sum of its proper divisors (43042867).

1279081421 is an equidigital number, since it uses as much as digits as its factorization.

1279081421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55723.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 1279081421 is about 35764.2478041969. The cubic root of 1279081421 is about 1085.5072545844.

The spelling of 1279081421 in words is "one billion, two hundred seventy-nine million, eighty-one thousand, four hundred twenty-one".