103662561 has 4 divisors (see below), whose sum is σ = 138216752. Its totient is φ = 69108372.

The previous prime is 103662553. The next prime is 103662569. The reversal of 103662561 is 165266301.

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.

It is an interprime number because it is at equal distance from previous prime (103662553) and next prime (103662569).

It is not a de Polignac number, because 103662561 - 2³ = 103662553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103662569) 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, 17277091 + ... + 17277096.

It is an arithmetic number, because the mean of its divisors is an integer number (34554188).

Almost surely, 2^103662561 is an apocalyptic number.

It is an amenable number.

103662561 is a deficient number, since it is larger than the sum of its proper divisors (34554191).

103662561 is an equidigital number, since it uses as much as digits as its factorization.

103662561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34554190.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 103662561 is about 10181.4812772995. The cubic root of 103662561 is about 469.7577761976.

It can be divided in two parts, 10 and 3662561, that added together give a triangular number (3662571 = T₂₇₀₆).

The spelling of 103662561 in words is "one hundred three million, six hundred sixty-two thousand, five hundred sixty-one".