1292989 has 2 divisors, whose sum is σ = 1292990. Its totient is φ = 1292988.

The previous prime is 1292983. The next prime is 1292999. The reversal of 1292989 is 9892921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 870489 + 422500 = 933^2 + 650^2 .

It is a cyclic number.

It is not a de Polignac number, because 1292989 - 2⁵ = 1292957 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1292983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646494 + 646495.

It is an arithmetic number, because the mean of its divisors is an integer number (646495).

2^1292989 is an apocalyptic number.

It is an amenable number.

1292989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1292989 is an equidigital number, since it uses as much as digits as its factorization.

1292989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 40.

The square root of 1292989 is about 1137.0967417067. The cubic root of 1292989 is about 108.9427356813.

The spelling of 1292989 in words is "one million, two hundred ninety-two thousand, nine hundred eighty-nine".