1215982 has 4 divisors (see below), whose sum is σ = 1823976. Its totient is φ = 607990.

The previous prime is 1215923. The next prime is 1216009. The reversal of 1215982 is 2895121.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1215982² = 2957224448648, which contains 22 as substring.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1215982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303994 + ... + 303997.

It is an arithmetic number, because the mean of its divisors is an integer number (455994).

2^1215982 is an apocalyptic number.

1215982 is a deficient number, since it is larger than the sum of its proper divisors (607994).

1215982 is an equidigital number, since it uses as much as digits as its factorization.

1215982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607993.

The product of its digits is 1440, while the sum is 28.

The square root of 1215982 is about 1102.7157385292. The cubic root of 1215982 is about 106.7355392881.

It can be divided in two parts, 1215 and 982, that added together give a cube (2197 = 13³).

The spelling of 1215982 in words is "one million, two hundred fifteen thousand, nine hundred eighty-two".