11421000 has 192 divisors, whose sum is σ = 40884480. Its totient is φ = 2980800.

The previous prime is 11420971. The next prime is 11421017. The reversal of 11421000 is 12411.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 242977 + ... + 243023.

It is an arithmetic number, because the mean of its divisors is an integer number (212940).

Almost surely, 2^11421000 is an apocalyptic number.

11421000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11421000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20442240).

11421000 is an abundant number, since it is smaller than the sum of its proper divisors (29463480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11421000 is an equidigital number, since it uses as much as digits as its factorization.

11421000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 11421000 is about 3379.4970039933. The cubic root of 11421000 is about 225.1998224851.

Adding to 11421000 its reverse (12411), we get a palindrome (11433411).

The spelling of 11421000 in words is "eleven million, four hundred twenty-one thousand".