1215994 has 8 divisors (see below), whose sum is σ = 1964340. Its totient is φ = 561216.

The previous prime is 1215923. The next prime is 1216009. The reversal of 1215994 is 4995121.

It can be written as a sum of positive squares in 2 ways, for example, as 1075369 + 140625 = 1037^2 + 375^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23359 + ... + 23410.

2^1215994 is an apocalyptic number.

1215994 is a deficient number, since it is larger than the sum of its proper divisors (748346).

1215994 is a wasteful number, since it uses less digits than its factorization.

1215994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46784.

The product of its digits is 3240, while the sum is 31.

The square root of 1215994 is about 1102.7211796279. The cubic root of 1215994 is about 106.7358903958.

It can be divided in two parts, 1215 and 994, that added together give a square (2209 = 47²).

The spelling of 1215994 in words is "one million, two hundred fifteen thousand, nine hundred ninety-four".