1189965 has 24 divisors (see below), whose sum is σ = 2216160. Its totient is φ = 543648.

The previous prime is 1189933. The next prime is 1189967. The reversal of 1189965 is 5699811.

1189965 = 58² + 59² + ... + 155².

It is not a de Polignac number, because 1189965 - 2⁵ = 1189933 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189967) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75 + ... + 1544.

It is an arithmetic number, because the mean of its divisors is an integer number (92340).

2^1189965 is an apocalyptic number.

1189965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1189965 is a deficient number, since it is larger than the sum of its proper divisors (1026195).

1189965 is a wasteful number, since it uses less digits than its factorization.

1189965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641 (or 1634 counting only the distinct ones).

The product of its digits is 19440, while the sum is 39.

The square root of 1189965 is about 1090.8551691219. The cubic root of 1189965 is about 105.9688112822.

The spelling of 1189965 in words is "one million, one hundred eighty-nine thousand, nine hundred sixty-five".