1187994 has 32 divisors (see below), whose sum is σ = 2652480. Its totient is φ = 352512.

The previous prime is 1187993. The next prime is 1187999. The reversal of 1187994 is 4997811.

It is a happy number.

It is a super-2 number, since 2×1187994² = 2822659488072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1187993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1632 + ... + 2244.

It is an arithmetic number, because the mean of its divisors is an integer number (82890).

2^1187994 is an apocalyptic number.

1187994 is an abundant number, since it is smaller than the sum of its proper divisors (1464486).

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

1187994 is a wasteful number, since it uses less digits than its factorization.

1187994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654.

The product of its digits is 18144, while the sum is 39.

The square root of 1187994 is about 1089.9513750622. The cubic root of 1187994 is about 105.9102717591.

The spelling of 1187994 in words is "one million, one hundred eighty-seven thousand, nine hundred ninety-four".