1290954881 has 2 divisors, whose sum is σ = 1290954882. Its totient is φ = 1290954880.

The previous prime is 1290954877. The next prime is 1290954883. The reversal of 1290954881 is 1884590921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 883278400 + 407676481 = 29720^2 + 20191^2 .

It is a cyclic number.

It is not a de Polignac number, because 1290954881 - 2² = 1290954877 is a prime.

It is a super-2 number, since 2×1290954881² = 3333129009555448322, which contains 22 as substring.

Together with 1290954883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1290954883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645477440 + 645477441.

It is an arithmetic number, because the mean of its divisors is an integer number (645477441).

Almost surely, 2^1290954881 is an apocalyptic number.

It is an amenable number.

1290954881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290954881 is an equidigital number, since it uses as much as digits as its factorization.

1290954881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 47.

The square root of 1290954881 is about 35929.8605758497. The cubic root of 1290954881 is about 1088.8557644331.

The spelling of 1290954881 in words is "one billion, two hundred ninety million, nine hundred fifty-four thousand, eight hundred eighty-one".