1188215 has 16 divisors (see below), whose sum is σ = 1726272. Its totient is φ = 766464.

The previous prime is 1188197. The next prime is 1188223. The reversal of 1188215 is 5128811.

It is a cyclic number.

It is not a de Polignac number, because 1188215 - 2⁶ = 1188151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404 + ... + 1593.

It is an arithmetic number, because the mean of its divisors is an integer number (107892).

2^1188215 is an apocalyptic number.

1188215 is a deficient number, since it is larger than the sum of its proper divisors (538057).

1188215 is a wasteful number, since it uses less digits than its factorization.

1188215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026.

The product of its digits is 640, while the sum is 26.

The square root of 1188215 is about 1090.0527510171. The cubic root of 1188215 is about 105.9168387728.

The spelling of 1188215 in words is "one million, one hundred eighty-eight thousand, two hundred fifteen".