1189215 has 32 divisors (see below), whose sum is σ = 2211840. Its totient is φ = 605088.

The previous prime is 1189213. The next prime is 1189219. The reversal of 1189215 is 5129811.

1189215 = T₂₀₄ + T₂₀₅ + ... + T₂₄₉.

It is not a de Polignac number, because 1189215 - 2¹ = 1189213 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2914 + ... + 3296.

It is an arithmetic number, because the mean of its divisors is an integer number (69120).

2^1189215 is an apocalyptic number.

1189215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1189215 is the 690-th heptagonal number.

1189215 is a deficient number, since it is larger than the sum of its proper divisors (1022625).

1189215 is a wasteful number, since it uses less digits than its factorization.

1189215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420 (or 414 counting only the distinct ones).

The product of its digits is 720, while the sum is 27.

The square root of 1189215 is about 1090.5113479465. The cubic root of 1189215 is about 105.9465435932.

The spelling of 1189215 in words is "one million, one hundred eighty-nine thousand, two hundred fifteen".