7409405 has 4 divisors (see below), whose sum is σ = 8891292. Its totient is φ = 5927520.

The previous prime is 7409393. The next prime is 7409407. The reversal of 7409405 is 5049047.

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 2696164 + 4713241 = 1642^2 + 2171^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7409405 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 (7409407) 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, 740936 + ... + 740945.

It is an arithmetic number, because the mean of its divisors is an integer number (2222823).

Almost surely, 2^7409405 is an apocalyptic number.

It is an amenable number.

7409405 is a deficient number, since it is larger than the sum of its proper divisors (1481887).

7409405 is a wasteful number, since it uses less digits than its factorization.

7409405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481886.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 7409405 is about 2722.0222262134. The cubic root of 7409405 is about 194.9520372944.

The spelling of 7409405 in words is "seven million, four hundred nine thousand, four hundred five".