10525721 has 2 divisors, whose sum is σ = 10525722. Its totient is φ = 10525720.

The previous prime is 10525717. The next prime is 10525727. The reversal of 10525721 is 12752501.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9853321 + 672400 = 3139^2 + 820^2 .

It is a cyclic number.

It is not a de Polignac number, because 10525721 - 2² = 10525717 is a prime.

It is a super-2 number, since 2×10525721² = 221581605139682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10525727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5262860 + 5262861.

It is an arithmetic number, because the mean of its divisors is an integer number (5262861).

Almost surely, 2^10525721 is an apocalyptic number.

It is an amenable number.

10525721 is a deficient number, since it is larger than the sum of its proper divisors (1).

10525721 is an equidigital number, since it uses as much as digits as its factorization.

10525721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 10525721 is about 3244.3367581063. The cubic root of 10525721 is about 219.1546137518.

The spelling of 10525721 in words is "ten million, five hundred twenty-five thousand, seven hundred twenty-one".