1290954991 has 2 divisors, whose sum is σ = 1290954992. Its totient is φ = 1290954990.

The previous prime is 1290954961. The next prime is 1290955009. The reversal of 1290954991 is 1994590921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1290954991 - 2¹⁵ = 1290922223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1290954911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645477495 + 645477496.

It is an arithmetic number, because the mean of its divisors is an integer number (645477496).

Almost surely, 2^1290954991 is an apocalyptic number.

1290954991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290954991 is an equidigital number, since it uses as much as digits as its factorization.

1290954991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 49.

The square root of 1290954991 is about 35929.8621066099. The cubic root of 1290954991 is about 1088.8557953596.

The spelling of 1290954991 in words is "one billion, two hundred ninety million, nine hundred fifty-four thousand, nine hundred ninety-one".