10421291 has 4 divisors (see below), whose sum is σ = 10969800. Its totient is φ = 9872784.

The previous prime is 10421287. The next prime is 10421293. The reversal of 10421291 is 19212401.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10421291 - 2² = 10421287 is a prime.

It is a super-2 number, since 2×10421291² = 217206612213362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10421293) 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, 274226 + ... + 274263.

It is an arithmetic number, because the mean of its divisors is an integer number (2742450).

Almost surely, 2^10421291 is an apocalyptic number.

10421291 is a deficient number, since it is larger than the sum of its proper divisors (548509).

10421291 is an equidigital number, since it uses as much as digits as its factorization.

10421291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548508.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 10421291 is about 3228.2024409879. The cubic root of 10421291 is about 218.4274292210.

Adding to 10421291 its reverse (19212401), we get a palindrome (29633692).

The spelling of 10421291 in words is "ten million, four hundred twenty-one thousand, two hundred ninety-one".