1290280379 has 8 divisors (see below), whose sum is σ = 1299928800. Its totient is φ = 1280664000.

The previous prime is 1290280361. The next prime is 1290280417. The reversal of 1290280379 is 9730820921.

It is a happy number.

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 1290280379 - 2¹² = 1290276283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1290280879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76079 + ... + 91479.

It is an arithmetic number, because the mean of its divisors is an integer number (162491100).

Almost surely, 2^1290280379 is an apocalyptic number.

1290280379 is a deficient number, since it is larger than the sum of its proper divisors (9648421).

1290280379 is a wasteful number, since it uses less digits than its factorization.

1290280379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16021.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 1290280379 is about 35920.4729785119. The cubic root of 1290280379 is about 1088.6660951816. Note that the first 3 decimals are identical.

The spelling of 1290280379 in words is "one billion, two hundred ninety million, two hundred eighty thousand, three hundred seventy-nine".