106612561 has 4 divisors (see below), whose sum is σ = 116304624. Its totient is φ = 96920500.

The previous prime is 106612549. The next prime is 106612619. The reversal of 106612561 is 165216601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 165216601 = 11 ⋅15019691.

It is a cyclic number.

It is not a de Polignac number, because 106612561 - 2⁷ = 106612433 is a prime.

It is a super-2 number, since 2×106612561² = 22732476325957442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106612531) 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, 4846015 + ... + 4846036.

It is an arithmetic number, because the mean of its divisors is an integer number (29076156).

Almost surely, 2^106612561 is an apocalyptic number.

106612561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

106612561 is a deficient number, since it is larger than the sum of its proper divisors (9692063).

106612561 is an equidigital number, since it uses as much as digits as its factorization.

106612561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9692062.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 106612561 is about 10325.3358783141. The cubic root of 106612561 is about 474.1722403354.

The spelling of 106612561 in words is "one hundred six million, six hundred twelve thousand, five hundred sixty-one".