1291912 has 16 divisors (see below), whose sum is σ = 2439360. Its totient is φ = 641424.

The previous prime is 1291909. The next prime is 1291931. The reversal of 1291912 is 2191921.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 853 + ... + 1819.

It is an arithmetic number, because the mean of its divisors is an integer number (152460).

2^1291912 is an apocalyptic number.

It is an amenable number.

1291912 is a deficient number, since it is larger than the sum of its proper divisors (1147448).

1291912 is a wasteful number, since it uses less digits than its factorization.

1291912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140 (or 1136 counting only the distinct ones).

The product of its digits is 324, while the sum is 25.

The square root of 1291912 is about 1136.6230685676. The cubic root of 1291912 is about 108.9124791933.

Subtracting 1291912 from its reverse (2191921), we obtain a palindrome (900009).

The spelling of 1291912 in words is "one million, two hundred ninety-one thousand, nine hundred twelve".