1215199 has 8 divisors (see below), whose sum is σ = 1261008. Its totient is φ = 1170240.

The previous prime is 1215197. The next prime is 1215209. The reversal of 1215199 is 9915121.

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 1215199 - 2¹ = 1215197 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4249 + ... + 4525.

It is an arithmetic number, because the mean of its divisors is an integer number (157626).

2^1215199 is an apocalyptic number.

1215199 is a deficient number, since it is larger than the sum of its proper divisors (45809).

1215199 is a wasteful number, since it uses less digits than its factorization.

1215199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425.

The product of its digits is 810, while the sum is 28.

The square root of 1215199 is about 1102.3606487897. The cubic root of 1215199 is about 106.7126245102.

The spelling of 1215199 in words is "one million, two hundred fifteen thousand, one hundred ninety-nine".