106603521 has 4 divisors (see below), whose sum is σ = 142138032. Its totient is φ = 71069012.

The previous prime is 106603489. The next prime is 106603537. The reversal of 106603521 is 125306601.

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 a cyclic number.

It is not a de Polignac number, because 106603521 - 2⁵ = 106603489 is a prime.

It is a super-2 number, since 2×106603521² = 22728621379194882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 106603491 and 106603500.

It is not an unprimeable number, because it can be changed into a prime (106603121) 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, 17767251 + ... + 17767256.

It is an arithmetic number, because the mean of its divisors is an integer number (35534508).

Almost surely, 2^106603521 is an apocalyptic number.

It is an amenable number.

106603521 is a deficient number, since it is larger than the sum of its proper divisors (35534511).

106603521 is an equidigital number, since it uses as much as digits as its factorization.

106603521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35534510.

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

The square root of 106603521 is about 10324.8981108774. The cubic root of 106603521 is about 474.1588377927.

The spelling of 106603521 in words is "one hundred six million, six hundred three thousand, five hundred twenty-one".