1189642 has 4 divisors (see below), whose sum is σ = 1784466. Its totient is φ = 594820.

The previous prime is 1189637. The next prime is 1189649. The reversal of 1189642 is 2469811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2469811 = 17 ⋅145283.

It can be written as a sum of positive squares in only one way, i.e., 1185921 + 3721 = 1089^2 + 61^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1189649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 297409 + ... + 297412.

2^1189642 is an apocalyptic number.

1189642 is a deficient number, since it is larger than the sum of its proper divisors (594824).

1189642 is an equidigital number, since it uses as much as digits as its factorization.

1189642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594823.

The product of its digits is 3456, while the sum is 31.

The square root of 1189642 is about 1090.7071100896. The cubic root of 1189642 is about 105.9592224782.

The spelling of 1189642 in words is "one million, one hundred eighty-nine thousand, six hundred forty-two".