1185990 has 32 divisors (see below), whose sum is σ = 3066336. Its totient is φ = 291840.

The previous prime is 1185979. The next prime is 1185997. The reversal of 1185990 is 995811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1185997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1131 + ... + 1910.

It is an arithmetic number, because the mean of its divisors is an integer number (95823).

2^1185990 is an apocalyptic number.

1185990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1185990 is an abundant number, since it is smaller than the sum of its proper divisors (1880346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1185990 is a wasteful number, since it uses less digits than its factorization.

1185990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3064.

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 1185990 is about 1089.0316799800. The cubic root of 1185990 is about 105.8506857006.

The spelling of 1185990 in words is "one million, one hundred eighty-five thousand, nine hundred ninety".