1191902 has 4 divisors (see below), whose sum is σ = 1787856. Its totient is φ = 595950.

The previous prime is 1191899. The next prime is 1191923. The reversal of 1191902 is 2091911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2091911 = 31 ⋅67481.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 297974 + ... + 297977.

It is an arithmetic number, because the mean of its divisors is an integer number (446964).

2^1191902 is an apocalyptic number.

1191902 is a deficient number, since it is larger than the sum of its proper divisors (595954).

1191902 is an equidigital number, since it uses as much as digits as its factorization.

1191902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595953.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 1191902 is about 1091.7426436665. The cubic root of 1191902 is about 106.0262780465.

Subtracting 1191902 from its reverse (2091911), we obtain a palindrome (900009).

The spelling of 1191902 in words is "one million, one hundred ninety-one thousand, nine hundred two".