10291261 has 4 divisors (see below), whose sum is σ = 10510272. Its totient is φ = 10072252.

The previous prime is 10291243. The next prime is 10291277. The reversal of 10291261 is 16219201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16219201 = 683 ⋅23747.

It is a cyclic number.

It is not a de Polignac number, because 10291261 - 2¹³ = 10283069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10291231) 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, 109435 + ... + 109528.

It is an arithmetic number, because the mean of its divisors is an integer number (2627568).

Almost surely, 2^10291261 is an apocalyptic number.

It is an amenable number.

10291261 is a deficient number, since it is larger than the sum of its proper divisors (219011).

10291261 is an equidigital number, since it uses as much as digits as its factorization.

10291261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219010.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 10291261 is about 3207.9995324189. Note that the first 3 decimals coincide. The cubic root of 10291261 is about 217.5151599069.

The spelling of 10291261 in words is "ten million, two hundred ninety-one thousand, two hundred sixty-one".