7057405 has 4 divisors (see below), whose sum is σ = 8468892. Its totient is φ = 5645920.

The previous prime is 7057381. The next prime is 7057409. The reversal of 7057405 is 5047507.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5047507 = 139 ⋅36313.

It can be written as a sum of positive squares in 2 ways, for example, as 2842596 + 4214809 = 1686^2 + 2053^2 .

It is not a de Polignac number, because 7057405 - 2⁵ = 7057373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7057409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705736 + ... + 705745.

It is an arithmetic number, because the mean of its divisors is an integer number (2117223).

Almost surely, 2^7057405 is an apocalyptic number.

It is an amenable number.

7057405 is a deficient number, since it is larger than the sum of its proper divisors (1411487).

7057405 is a wasteful number, since it uses less digits than its factorization.

7057405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411486.

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 7057405 is about 2656.5776856700. The cubic root of 7057405 is about 191.8146087357.

It can be divided in two parts, 70 and 57405, that added together give a palindrome (57475).

The spelling of 7057405 in words is "seven million, fifty-seven thousand, four hundred five".