1290215 has 16 divisors (see below), whose sum is σ = 1682208. Its totient is φ = 946176.

The previous prime is 1290209. The next prime is 1290257. The reversal of 1290215 is 5120921.

1290215 = T₁₃₀ + T₁₃₁ + ... + T₂₁₄.

It is a cyclic number.

It is not a de Polignac number, because 1290215 - 2⁴ = 1290199 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 3479 + ... + 3831.

It is an arithmetic number, because the mean of its divisors is an integer number (105138).

2^1290215 is an apocalyptic number.

1290215 is a deficient number, since it is larger than the sum of its proper divisors (391993).

1290215 is a wasteful number, since it uses less digits than its factorization.

1290215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1290215 is about 1135.8763136891. The cubic root of 1290215 is about 108.8647707162.

The spelling of 1290215 in words is "one million, two hundred ninety thousand, two hundred fifteen".