1818725 has 12 divisors (see below), whose sum is σ = 2354016. Its totient is φ = 1391280.

The previous prime is 1818721. The next prime is 1818727. The reversal of 1818725 is 5278181.

It is a happy number.

It is not a de Polignac number, because 1818725 - 2² = 1818721 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1818691 and 1818700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1007 + ... + 2156.

It is an arithmetic number, because the mean of its divisors is an integer number (196168).

2^1818725 is an apocalyptic number.

It is an amenable number.

1818725 is a deficient number, since it is larger than the sum of its proper divisors (535291).

1818725 is a wasteful number, since it uses less digits than its factorization.

1818725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196 (or 3191 counting only the distinct ones).

The product of its digits is 4480, while the sum is 32.

The square root of 1818725 is about 1348.6011270943. The cubic root of 1818725 is about 122.0643976062.

The spelling of 1818725 in words is "one million, eight hundred eighteen thousand, seven hundred twenty-five".