285757425 has 18 divisors (see below), whose sum is σ = 511823702. Its totient is φ = 152403840.

The previous prime is 285757391. The next prime is 285757429. The reversal of 285757425 is 524757582.

285757425 is a `hidden beast` number, since 2 + 8 + 57 + 574 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 61027344 + 224730081 = 7812^2 + 14991^2 .

It is not a de Polignac number, because 285757425 - 2¹⁸ = 285495281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285757429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 634792 + ... + 635241.

Almost surely, 2^285757425 is an apocalyptic number.

285757425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

285757425 is a deficient number, since it is larger than the sum of its proper divisors (226066277).

285757425 is a wasteful number, since it uses less digits than its factorization.

285757425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270049 (or 1270041 counting only the distinct ones).

The product of its digits is 784000, while the sum is 45.

The square root of 285757425 is about 16904.3611236864. The cubic root of 285757425 is about 658.6669028282. Note that the first 3 decimals are identical.

The spelling of 285757425 in words is "two hundred eighty-five million, seven hundred fifty-seven thousand, four hundred twenty-five".