1491111 has 12 divisors (see below), whose sum is σ = 2204488. Its totient is φ = 970704.

The previous prime is 1491109. The next prime is 1491157. The reversal of 1491111 is 1111941.

It is not a de Polignac number, because 1491111 - 2¹ = 1491109 is a prime.

It is a Duffinian number.

1491111 is a modest number, since divided by 1111 gives 149 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1540 + ... + 2313.

2^1491111 is an apocalyptic number.

1491111 is a deficient number, since it is larger than the sum of its proper divisors (713377).

1491111 is a wasteful number, since it uses less digits than its factorization.

1491111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3902 (or 3899 counting only the distinct ones).

The product of its digits is 36, while the sum is 18.

The square root of 1491111 is about 1221.1105601050. The cubic root of 1491111 is about 114.2448568981.

It can be divided in two parts, 14 and 91111, that added together give a cube (91125 = 45³).

The spelling of 1491111 in words is "one million, four hundred ninety-one thousand, one hundred eleven".