11252721 has 8 divisors (see below), whose sum is σ = 15487744. Its totient is φ = 7259760.

The previous prime is 11252707. The next prime is 11252723. The reversal of 11252721 is 12725211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11252721 - 2⁹ = 11252209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11252723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60406 + ... + 60591.

It is an arithmetic number, because the mean of its divisors is an integer number (1935968).

Almost surely, 2^11252721 is an apocalyptic number.

It is an amenable number.

11252721 is a deficient number, since it is larger than the sum of its proper divisors (4235023).

11252721 is a wasteful number, since it uses less digits than its factorization.

11252721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121031.

The product of its digits is 280, while the sum is 21.

The square root of 11252721 is about 3354.5075644571. The cubic root of 11252721 is about 224.0883009121.

Adding to 11252721 its reverse (12725211), we get a palindrome (23977932).

The spelling of 11252721 in words is "eleven million, two hundred fifty-two thousand, seven hundred twenty-one".