1290243056 has 40 divisors (see below), whose sum is σ = 2529326208. Its totient is φ = 637560000.

The previous prime is 1290243037. The next prime is 1290243061. The reversal of 1290243056 is 6503420921.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 508511 + ... + 511041.

Almost surely, 2^1290243056 is an apocalyptic number.

1290243056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1290243056 is a deficient number, since it is larger than the sum of its proper divisors (1239083152).

1290243056 is a wasteful number, since it uses less digits than its factorization.

1290243056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901 (or 2895 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1290243056 is about 35919.9534520857. The cubic root of 1290243056 is about 1088.6555980635.

Adding to 1290243056 its reverse (6503420921), we get a palindrome (7793663977).

The spelling of 1290243056 in words is "one billion, two hundred ninety million, two hundred forty-three thousand, fifty-six".