1290965 has 8 divisors (see below), whose sum is σ = 1668408. Its totient is φ = 953280.

The previous prime is 1290937. The next prime is 1290983. The reversal of 1290965 is 5690921.

It can be written as a sum of positive squares in 4 ways, for example, as 56644 + 1234321 = 238^2 + 1111^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1290965 - 2⁶ = 1290901 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9866 + ... + 9995.

It is an arithmetic number, because the mean of its divisors is an integer number (208551).

2^1290965 is an apocalyptic number.

It is an amenable number.

1290965 is a deficient number, since it is larger than the sum of its proper divisors (377443).

1290965 is a wasteful number, since it uses less digits than its factorization.

1290965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19879.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 1290965 is about 1136.2064073046. The cubic root of 1290965 is about 108.8858609382.

The spelling of 1290965 in words is "one million, two hundred ninety thousand, nine hundred sixty-five".