1780525 has 12 divisors (see below), whose sum is σ = 2242912. Its totient is φ = 1401840.

The previous prime is 1780523. The next prime is 1780549. The reversal of 1780525 is 5250871.

It is not a de Polignac number, because 1780525 - 2¹ = 1780523 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1780493 and 1780502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1780523) 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, 1144 + ... + 2206.

2^1780525 is an apocalyptic number.

It is an amenable number.

1780525 is a deficient number, since it is larger than the sum of its proper divisors (462387).

1780525 is a wasteful number, since it uses less digits than its factorization.

1780525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 1780525 is about 1334.3631439754. The cubic root of 1780525 is about 121.2037411662.

The spelling of 1780525 in words is "one million, seven hundred eighty thousand, five hundred twenty-five".