1189651 has 2 divisors, whose sum is σ = 1189652. Its totient is φ = 1189650.

The previous prime is 1189649. The next prime is 1189673. The reversal of 1189651 is 1569811.

It is a weak prime.

It is an emirp because it is prime and its reverse (1569811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1189651 - 2¹ = 1189649 is a prime.

Together with 1189649, it forms a pair of twin primes.

1189651 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1189621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594825 + 594826.

It is an arithmetic number, because the mean of its divisors is an integer number (594826).

2^1189651 is an apocalyptic number.

1189651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189651 is an equidigital number, since it uses as much as digits as its factorization.

1189651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 31.

The square root of 1189651 is about 1090.7112358457. The cubic root of 1189651 is about 105.9594896820.

The spelling of 1189651 in words is "one million, one hundred eighty-nine thousand, six hundred fifty-one".