7401605 has 4 divisors (see below), whose sum is σ = 8881932. Its totient is φ = 5921280.

The previous prime is 7401599. The next prime is 7401617. The reversal of 7401605 is 5061047.

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 5597956 + 1803649 = 2366^2 + 1343^2 .

It is not a de Polignac number, because 7401605 - 2⁸ = 7401349 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 740156 + ... + 740165.

It is an arithmetic number, because the mean of its divisors is an integer number (2220483).

Almost surely, 2^7401605 is an apocalyptic number.

It is an amenable number.

7401605 is a deficient number, since it is larger than the sum of its proper divisors (1480327).

7401605 is a wasteful number, since it uses less digits than its factorization.

7401605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480326.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 7401605 is about 2720.5890906199. The cubic root of 7401605 is about 194.8836035584.

Adding to 7401605 its sum of digits (23), we get a triangular number (7401628 = T₃₈₄₇).

The spelling of 7401605 in words is "seven million, four hundred one thousand, six hundred five".