1491985 has 8 divisors (see below), whose sum is σ = 1953216. Its totient is φ = 1085040.

The previous prime is 1491979. The next prime is 1491989. The reversal of 1491985 is 5891941.

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

It is not a de Polignac number, because 1491985 - 2³ = 1491977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1491989) 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, 13509 + ... + 13618.

It is an arithmetic number, because the mean of its divisors is an integer number (244152).

2^1491985 is an apocalyptic number.

It is an amenable number.

1491985 is a deficient number, since it is larger than the sum of its proper divisors (461231).

1491985 is a wasteful number, since it uses less digits than its factorization.

1491985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27143.

The product of its digits is 12960, while the sum is 37.

The square root of 1491985 is about 1221.4683786329. The cubic root of 1491985 is about 114.2671737036.

The spelling of 1491985 in words is "one million, four hundred ninety-one thousand, nine hundred eighty-five".