7261405 has 4 divisors (see below), whose sum is σ = 8713692. Its totient is φ = 5809120.

The previous prime is 7261403. The next prime is 7261433. The reversal of 7261405 is 5041627.

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 5731236 + 1530169 = 2394^2 + 1237^2 .

It is not a de Polignac number, because 7261405 - 2¹ = 7261403 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7261405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7261403) 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, 726136 + ... + 726145.

It is an arithmetic number, because the mean of its divisors is an integer number (2178423).

Almost surely, 2^7261405 is an apocalyptic number.

It is an amenable number.

7261405 is a deficient number, since it is larger than the sum of its proper divisors (1452287).

7261405 is a wasteful number, since it uses less digits than its factorization.

7261405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452286.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 7261405 is about 2694.6994266523. The cubic root of 7261405 is about 193.6452670172.

The spelling of 7261405 in words is "seven million, two hundred sixty-one thousand, four hundred five".