2613561 has 8 divisors (see below), whose sum is σ = 3500640. Its totient is φ = 1734432.

The previous prime is 2613547. The next prime is 2613601. The reversal of 2613561 is 1653162.

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

It is not a de Polignac number, because 2613561 - 2¹⁰ = 2612537 is a prime.

It is a super-2 number, since 2×2613561² = 13661402201442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2613521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1171 + ... + 2568.

It is an arithmetic number, because the mean of its divisors is an integer number (437580).

2^2613561 is an apocalyptic number.

It is an amenable number.

2613561 is a deficient number, since it is larger than the sum of its proper divisors (887079).

2613561 is a wasteful number, since it uses less digits than its factorization.

2613561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3975.

The product of its digits is 1080, while the sum is 24.

The square root of 2613561 is about 1616.6511683106. The cubic root of 2613561 is about 137.7455403292.

The spelling of 2613561 in words is "two million, six hundred thirteen thousand, five hundred sixty-one".