11257621 has 8 divisors (see below), whose sum is σ = 11963160. Its totient is φ = 10556928.

The previous prime is 11257573. The next prime is 11257627. The reversal of 11257621 is 12675211.

It can be written as a sum of positive squares in 4 ways, for example, as 2436721 + 8820900 = 1561^2 + 2970^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11257621 - 2⁹ = 11257109 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 (11257627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4345 + ... + 6433.

It is an arithmetic number, because the mean of its divisors is an integer number (1495395).

Almost surely, 2^11257621 is an apocalyptic number.

It is an amenable number.

11257621 is a deficient number, since it is larger than the sum of its proper divisors (705539).

11257621 is a wasteful number, since it uses less digits than its factorization.

11257621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2423.

The product of its digits is 840, while the sum is 25.

The square root of 11257621 is about 3355.2378455186. The cubic root of 11257621 is about 224.1208226264.

The spelling of 11257621 in words is "eleven million, two hundred fifty-seven thousand, six hundred twenty-one".