1491121 has 8 divisors (see below), whose sum is σ = 1589760. Its totient is φ = 1393728.

The previous prime is 1491109. The next prime is 1491157. The reversal of 1491121 is 1211941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1491121 - 2⁹ = 1490609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1491421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3880 + ... + 4246.

It is an arithmetic number, because the mean of its divisors is an integer number (198720).

2^1491121 is an apocalyptic number.

It is an amenable number.

1491121 is a deficient number, since it is larger than the sum of its proper divisors (98639).

1491121 is a wasteful number, since it uses less digits than its factorization.

1491121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623.

The product of its digits is 72, while the sum is 19.

The square root of 1491121 is about 1221.1146547315. The cubic root of 1491121 is about 114.2451122884.

The spelling of 1491121 in words is "one million, four hundred ninety-one thousand, one hundred twenty-one".