7613561 has 4 divisors (see below), whose sum is σ = 7625124. Its totient is φ = 7602000.

The previous prime is 7613539. The next prime is 7613579. The reversal of 7613561 is 1653167.

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 4923961 + 2689600 = 2219^2 + 1640^2 .

It is a cyclic number.

It is not a de Polignac number, because 7613561 - 2⁶ = 7613497 is a prime.

It is a super-2 number, since 2×7613561² = 115932622201442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7613581) 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, 4730 + ... + 6131.

It is an arithmetic number, because the mean of its divisors is an integer number (1906281).

Almost surely, 2^7613561 is an apocalyptic number.

It is an amenable number.

7613561 is a deficient number, since it is larger than the sum of its proper divisors (11563).

7613561 is a wasteful number, since it uses less digits than its factorization.

7613561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11562.

The product of its digits is 3780, while the sum is 29.

The square root of 7613561 is about 2759.2682000849. The cubic root of 7613561 is about 196.7263845588.

The spelling of 7613561 in words is "seven million, six hundred thirteen thousand, five hundred sixty-one".