10531421 has 4 divisors (see below), whose sum is σ = 10816092. Its totient is φ = 10246752.

The previous prime is 10531373. The next prime is 10531429. The reversal of 10531421 is 12413501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12413501 = 53 ⋅234217.

It can be written as a sum of positive squares in 2 ways, for example, as 8323225 + 2208196 = 2885^2 + 1486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10531421 is a prime.

It is a super-2 number, since 2×10531421² = 221821656558482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10531421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10531429) 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 3 ways as a sum of consecutive naturals, for example, 142280 + ... + 142353.

It is an arithmetic number, because the mean of its divisors is an integer number (2704023).

Almost surely, 2^10531421 is an apocalyptic number.

It is an amenable number.

10531421 is a deficient number, since it is larger than the sum of its proper divisors (284671).

10531421 is an equidigital number, since it uses as much as digits as its factorization.

10531421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284670.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 10531421 is about 3245.2150930254. The cubic root of 10531421 is about 219.1941662561.

Adding to 10531421 its reverse (12413501), we get a palindrome (22944922).

The spelling of 10531421 in words is "ten million, five hundred thirty-one thousand, four hundred twenty-one".