1491825 has 12 divisors (see below), whose sum is σ = 2466608. Its totient is φ = 795600.

The previous prime is 1491821. The next prime is 1491839. The reversal of 1491825 is 5281941.

It is a happy number.

It is not a de Polignac number, because 1491825 - 2² = 1491821 is a prime.

It is a Duffinian number.

1491825 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1491792 and 1491801.

It is not an unprimeable number, because it can be changed into a prime (1491821) 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 11 ways as a sum of consecutive naturals, for example, 9871 + ... + 10020.

2^1491825 is an apocalyptic number.

1491825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1491825 is a deficient number, since it is larger than the sum of its proper divisors (974783).

1491825 is a wasteful number, since it uses less digits than its factorization.

1491825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19904 (or 19899 counting only the distinct ones).

The product of its digits is 2880, while the sum is 30.

The square root of 1491825 is about 1221.4028819354. The cubic root of 1491825 is about 114.2630888991.

The spelling of 1491825 in words is "one million, four hundred ninety-one thousand, eight hundred twenty-five".