1215056 has 10 divisors (see below), whose sum is σ = 2354202. Its totient is φ = 607520.

The previous prime is 1215047. The next prime is 1215079. The reversal of 1215056 is 6505121.

It can be written as a sum of positive squares in only one way, i.e., 1175056 + 40000 = 1084^2 + 200^2 .

It is a super-2 number, since 2×1215056² = 2952722166272, 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 (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37955 + ... + 37986.

2^1215056 is an apocalyptic number.

1215056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1215056 is a deficient number, since it is larger than the sum of its proper divisors (1139146).

1215056 is an equidigital number, since it uses as much as digits as its factorization.

1215056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75949 (or 75943 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1215056 is about 1102.2957860756. The cubic root of 1215056 is about 106.7084385007.

The spelling of 1215056 in words is "one million, two hundred fifteen thousand, fifty-six".