11552421 has 8 divisors (see below), whose sum is σ = 15492960. Its totient is φ = 7656752.

The previous prime is 11552413. The next prime is 11552449. The reversal of 11552421 is 12425511.

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 11552421 - 2³ = 11552413 is a prime.

It is a super-2 number, since 2×11552421² = 266916861922482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11550421) 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, 10611 + ... + 11648.

It is an arithmetic number, because the mean of its divisors is an integer number (1936620).

Almost surely, 2^11552421 is an apocalyptic number.

It is an amenable number.

11552421 is a deficient number, since it is larger than the sum of its proper divisors (3940539).

11552421 is a wasteful number, since it uses less digits than its factorization.

11552421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22435.

The product of its digits is 400, while the sum is 21.

The square root of 11552421 is about 3398.8852584340. The cubic root of 11552421 is about 226.0603188254.

Adding to 11552421 its reverse (12425511), we get a palindrome (23977932).

The spelling of 11552421 in words is "eleven million, five hundred fifty-two thousand, four hundred twenty-one".