775425 has 36 divisors (see below), whose sum is σ = 1498416. Its totient is φ = 352800.

The previous prime is 775417. The next prime is 775441. The reversal of 775425 is 524577.

775425 = 101² + 102² + ... + 149².

It is not a de Polignac number, because 775425 - 2³ = 775417 is a prime.

It is a Curzon number.

775425 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 775392 and 775401.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 775425.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3570 + ... + 3780.

2⁷⁷⁵⁴²⁵ is an apocalyptic number.

775425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

775425 is a deficient number, since it is larger than the sum of its proper divisors (722991).

775425 is a wasteful number, since it uses less digits than its factorization.

775425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 226 counting only the distinct ones).

The product of its digits is 9800, while the sum is 30.

The square root of 775425 is about 880.5821937786. The cubic root of 775425 is about 91.8713150449.

Subtracting from 775425 its product of digits (9800), we obtain a square (765625 = 875²).

The spelling of 775425 in words is "seven hundred seventy-five thousand, four hundred twenty-five".