10521345 has 48 divisors (see below), whose sum is σ = 18653760. Its totient is φ = 5056128.

The previous prime is 10521331. The next prime is 10521359. The reversal of 10521345 is 54312501.

It is an interprime number because it is at equal distance from previous prime (10521331) and next prime (10521359).

It is not a de Polignac number, because 10521345 - 2⁸ = 10521089 is a prime.

It is a super-2 number, since 2×10521345² = 221397401218050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157002 + ... + 157068.

It is an arithmetic number, because the mean of its divisors is an integer number (388620).

Almost surely, 2^10521345 is an apocalyptic number.

10521345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10521345 is a deficient number, since it is larger than the sum of its proper divisors (8132415).

10521345 is a wasteful number, since it uses less digits than its factorization.

10521345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 10521345 is about 3243.6622820510. The cubic root of 10521345 is about 219.1242388406.

Adding to 10521345 its reverse (54312501), we get a palindrome (64833846).

The spelling of 10521345 in words is "ten million, five hundred twenty-one thousand, three hundred forty-five".