1878725 has 6 divisors (see below), whose sum is σ = 2329650. Its totient is φ = 1502960.

The previous prime is 1878697. The next prime is 1878733. The reversal of 1878725 is 5278781.

It can be written as a sum of positive squares in 3 ways, for example, as 12769 + 1865956 = 113^2 + 1366^2 .

It is not a de Polignac number, because 1878725 - 2¹² = 1874629 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 37550 + ... + 37599.

It is an arithmetic number, because the mean of its divisors is an integer number (388275).

2^1878725 is an apocalyptic number.

It is an amenable number.

1878725 is a deficient number, since it is larger than the sum of its proper divisors (450925).

1878725 is an equidigital number, since it uses as much as digits as its factorization.

1878725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75159 (or 75154 counting only the distinct ones).

The product of its digits is 31360, while the sum is 38.

The square root of 1878725 is about 1370.6658965627. The cubic root of 1878725 is about 123.3922087217.

The spelling of 1878725 in words is "one million, eight hundred seventy-eight thousand, seven hundred twenty-five".