10259721 has 12 divisors (see below), whose sum is σ = 15691572. Its totient is φ = 6437376.

The previous prime is 10259699. The next prime is 10259731. The reversal of 10259721 is 12795201.

It can be written as a sum of positive squares in 2 ways, for example, as 8732025 + 1527696 = 2955^2 + 1236^2 .

It is not a de Polignac number, because 10259721 - 2⁶ = 10259657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10259731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33376 + ... + 33681.

It is an arithmetic number, because the mean of its divisors is an integer number (1307631).

Almost surely, 2^10259721 is an apocalyptic number.

It is an amenable number.

10259721 is a deficient number, since it is larger than the sum of its proper divisors (5431851).

10259721 is a wasteful number, since it uses less digits than its factorization.

10259721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67080 (or 67077 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 10259721 is about 3203.0799240731. The cubic root of 10259721 is about 217.2927236551.

The spelling of 10259721 in words is "ten million, two hundred fifty-nine thousand, seven hundred twenty-one".