1290112399 has 4 divisors (see below), whose sum is σ = 1331728960. Its totient is φ = 1248495840.

The previous prime is 1290112393. The next prime is 1290112427. The reversal of 1290112399 is 9932110921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1290112399 - 2⁵ = 1290112367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290112393) 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 3 ways as a sum of consecutive naturals, for example, 20808234 + ... + 20808295.

It is an arithmetic number, because the mean of its divisors is an integer number (332932240).

Almost surely, 2^1290112399 is an apocalyptic number.

1290112399 is a deficient number, since it is larger than the sum of its proper divisors (41616561).

1290112399 is an equidigital number, since it uses as much as digits as its factorization.

1290112399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41616560.

The product of its (nonzero) digits is 8748, while the sum is 37.

The square root of 1290112399 is about 35918.1346815226. The cubic root of 1290112399 is about 1088.6188491023.

The spelling of 1290112399 in words is "one billion, two hundred ninety million, one hundred twelve thousand, three hundred ninety-nine".