775420 has 24 divisors (see below), whose sum is σ = 1646064. Its totient is φ = 306816.

The previous prime is 775417. The next prime is 775441. The reversal of 775420 is 24577.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2599 + ... + 2881.

It is an arithmetic number, because the mean of its divisors is an integer number (68586).

2⁷⁷⁵⁴²⁰ is an apocalyptic number.

It is an amenable number.

775420 is an abundant number, since it is smaller than the sum of its proper divisors (870644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

775420 is a wasteful number, since it uses less digits than its factorization.

775420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 775420 is about 880.5793547432. The cubic root of 775420 is about 91.8711175801.

Adding to 775420 its reverse (24577), we get a palindrome (799997).

The spelling of 775420 in words is "seven hundred seventy-five thousand, four hundred twenty".