1191642 has 16 divisors (see below), whose sum is σ = 2508960. Its totient is φ = 376272.

The previous prime is 1191637. The next prime is 1191643. The reversal of 1191642 is 2461911.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1191643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5113 + ... + 5340.

It is an arithmetic number, because the mean of its divisors is an integer number (156810).

2^1191642 is an apocalyptic number.

1191642 is an abundant number, since it is smaller than the sum of its proper divisors (1317318).

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

1191642 is a wasteful number, since it uses less digits than its factorization.

1191642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10477.

The product of its digits is 432, while the sum is 24.

The square root of 1191642 is about 1091.6235614899. The cubic root of 1191642 is about 106.0185680063.

It can be divided in two parts, 119164 and 2, that multiplied together give a cube (238328 = 62³).

The spelling of 1191642 in words is "one million, one hundred ninety-one thousand, six hundred forty-two".