10552721 has 4 divisors (see below), whose sum is σ = 10560000. Its totient is φ = 10545444.

The previous prime is 10552709. The next prime is 10552747. The reversal of 10552721 is 12725501.

It is a happy number.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10552721 is a prime.

It is a super-2 number, since 2×10552721² = 222719841007682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10552021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641 + ... + 4638.

It is an arithmetic number, because the mean of its divisors is an integer number (2640000).

Almost surely, 2^10552721 is an apocalyptic number.

It is an amenable number.

10552721 is a deficient number, since it is larger than the sum of its proper divisors (7279).

10552721 is an equidigital number, since it uses as much as digits as its factorization.

10552721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7278.

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

The square root of 10552721 is about 3248.4951900842. The cubic root of 10552721 is about 219.3418415372.

The spelling of 10552721 in words is "ten million, five hundred fifty-two thousand, seven hundred twenty-one".