1491853 has 4 divisors (see below), whose sum is σ = 1627488. Its totient is φ = 1356220.

The previous prime is 1491851. The next prime is 1491859. The reversal of 1491853 is 3581941.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3581941 = 11 ⋅325631.

It is a cyclic number.

It is not a de Polignac number, because 1491853 - 2¹ = 1491851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67801 + ... + 67822.

It is an arithmetic number, because the mean of its divisors is an integer number (406872).

2^1491853 is an apocalyptic number.

It is an amenable number.

1491853 is a deficient number, since it is larger than the sum of its proper divisors (135635).

1491853 is a wasteful number, since it uses less digits than its factorization.

1491853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135634.

The product of its digits is 4320, while the sum is 31.

The square root of 1491853 is about 1221.4143441110. The cubic root of 1491853 is about 114.2638037610.

It can be divided in two parts, 149 and 1853, that added together give a palindrome (2002).

The spelling of 1491853 in words is "one million, four hundred ninety-one thousand, eight hundred fifty-three".