5257405 has 4 divisors (see below), whose sum is σ = 6308892. Its totient is φ = 4205920.

The previous prime is 5257393. The next prime is 5257451. The reversal of 5257405 is 5047525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1340964 + 3916441 = 1158^2 + 1979^2 .

It is not a de Polignac number, because 5257405 - 2⁷ = 5257277 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 525736 + ... + 525745.

It is an arithmetic number, because the mean of its divisors is an integer number (1577223).

Almost surely, 2^5257405 is an apocalyptic number.

It is an amenable number.

5257405 is a deficient number, since it is larger than the sum of its proper divisors (1051487).

5257405 is a wasteful number, since it uses less digits than its factorization.

5257405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051486.

The product of its (nonzero) digits is 7000, while the sum is 28.

The square root of 5257405 is about 2292.9031815583. The cubic root of 5257405 is about 173.8830080694.

The spelling of 5257405 in words is "five million, two hundred fifty-seven thousand, four hundred five".