1191916 has 24 divisors (see below), whose sum is σ = 2306304. Its totient is φ = 534480.

The previous prime is 1191899. The next prime is 1191923. The reversal of 1191916 is 6191911.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4401 + ... + 4663.

It is an arithmetic number, because the mean of its divisors is an integer number (96096).

2^1191916 is an apocalyptic number.

It is an amenable number.

1191916 is a deficient number, since it is larger than the sum of its proper divisors (1114388).

1191916 is a wasteful number, since it uses less digits than its factorization.

1191916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 379 counting only the distinct ones).

The product of its digits is 486, while the sum is 28.

The square root of 1191916 is about 1091.7490554152. The cubic root of 1191916 is about 106.0266931707.

It can be divided in two parts, 11919 and 16, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 1191916 in words is "one million, one hundred ninety-one thousand, nine hundred sixteen".