1256215 has 8 divisors (see below), whose sum is σ = 1596240. Its totient is φ = 945792.

The previous prime is 1256209. The next prime is 1256231. The reversal of 1256215 is 5126521.

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

It is a cyclic number.

It is not a de Polignac number, because 1256215 - 2¹⁵ = 1223447 is a prime.

It is a super-2 number, since 2×1256215² = 3156152252450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7305 + ... + 7474.

It is an arithmetic number, because the mean of its divisors is an integer number (199530).

2^1256215 is an apocalyptic number.

1256215 is a deficient number, since it is larger than the sum of its proper divisors (340025).

1256215 is a wasteful number, since it uses less digits than its factorization.

1256215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14801.

The product of its digits is 600, while the sum is 22.

The square root of 1256215 is about 1120.8099749735. The cubic root of 1256215 is about 107.8999702524.

The spelling of 1256215 in words is "one million, two hundred fifty-six thousand, two hundred fifteen".