1779225 has 24 divisors (see below), whose sum is σ = 3362880. Its totient is φ = 813120.

The previous prime is 1779223. The next prime is 1779227. The reversal of 1779225 is 5229771.

It is an interprime number because it is at equal distance from previous prime (1779223) and next prime (1779227).

It is not a de Polignac number, because 1779225 - 2¹ = 1779223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1779223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1170 + ... + 2219.

It is an arithmetic number, because the mean of its divisors is an integer number (140120).

2^1779225 is an apocalyptic number.

1779225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1779225 is a deficient number, since it is larger than the sum of its proper divisors (1583655).

1779225 is a wasteful number, since it uses less digits than its factorization.

1779225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3409 (or 3404 counting only the distinct ones).

The product of its digits is 8820, while the sum is 33.

The square root of 1779225 is about 1333.8759312620. The cubic root of 1779225 is about 121.1742361558.

The spelling of 1779225 in words is "one million, seven hundred seventy-nine thousand, two hundred twenty-five".