1491899 has 8 divisors (see below), whose sum is σ = 1581840. Its totient is φ = 1403136.

The previous prime is 1491863. The next prime is 1491911. The reversal of 1491899 is 9981941.

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

It is a cyclic number.

It is not a de Polignac number, because 1491899 - 2⁸ = 1491643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1491839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4259 + ... + 4595.

It is an arithmetic number, because the mean of its divisors is an integer number (197730).

2^1491899 is an apocalyptic number.

1491899 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1491899 is a deficient number, since it is larger than the sum of its proper divisors (89941).

1491899 is a wasteful number, since it uses less digits than its factorization.

1491899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589.

The product of its digits is 23328, while the sum is 41.

The square root of 1491899 is about 1221.4331745945. The cubic root of 1491899 is about 114.2649781575.

It can be divided in two parts, 149 and 1899, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1491899 in words is "one million, four hundred ninety-one thousand, eight hundred ninety-nine".