10521438 has 16 divisors (see below), whose sum is σ = 21100176. Its totient is φ = 3497600.

The previous prime is 10521437. The next prime is 10521439. The reversal of 10521438 is 83412501.

It is an interprime number because it is at equal distance from previous prime (10521437) and next prime (10521439).

It is a super-2 number, since 2×10521438² = 221401315175688, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10521437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220 + ... + 4592.

It is an arithmetic number, because the mean of its divisors is an integer number (1318761).

Almost surely, 2^10521438 is an apocalyptic number.

10521438 is an abundant number, since it is smaller than the sum of its proper divisors (10578738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10521438 is a wasteful number, since it uses less digits than its factorization.

10521438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4779.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 10521438 is about 3243.6766176671. The cubic root of 10521438 is about 219.1248844644.

Adding to 10521438 its reverse (83412501), we get a palindrome (93933939).

The spelling of 10521438 in words is "ten million, five hundred twenty-one thousand, four hundred thirty-eight".