7564405 has 8 divisors (see below), whose sum is σ = 9611352. Its totient is φ = 5695488.

The previous prime is 7564397. The next prime is 7564421. The reversal of 7564405 is 5044657.

It is a happy number.

7564405 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3651921 + 3912484 = 1911^2 + 1978^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7564405 - 2³ = 7564397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44412 + ... + 44581.

It is an arithmetic number, because the mean of its divisors is an integer number (1201419).

Almost surely, 2^7564405 is an apocalyptic number.

It is an amenable number.

7564405 is a deficient number, since it is larger than the sum of its proper divisors (2046947).

7564405 is a wasteful number, since it uses less digits than its factorization.

7564405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89015.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 7564405 is about 2750.3463418268. The cubic root of 7564405 is about 196.3020903823.

The spelling of 7564405 in words is "seven million, five hundred sixty-four thousand, four hundred five".