10521619 has 4 divisors (see below), whose sum is σ = 10528144. Its totient is φ = 10515096.

The previous prime is 10521607. The next prime is 10521629. The reversal of 10521619 is 91612501.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 91612501 = 149 ⋅614849.

It is a cyclic number.

It is not a de Polignac number, because 10521619 - 2⁵ = 10521587 is a prime.

It is a super-2 number, since 2×10521619² = 221408932762322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10521593 and 10521602.

It is not an unprimeable number, because it can be changed into a prime (10521629) 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, 1114 + ... + 4720.

It is an arithmetic number, because the mean of its divisors is an integer number (2632036).

Almost surely, 2^10521619 is an apocalyptic number.

10521619 is a deficient number, since it is larger than the sum of its proper divisors (6525).

10521619 is an equidigital number, since it uses as much as digits as its factorization.

10521619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6524.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 10521619 is about 3243.7045179856. The cubic root of 10521619 is about 219.1261409903.

The spelling of 10521619 in words is "ten million, five hundred twenty-one thousand, six hundred nineteen".