11451420 has 72 divisors (see below), whose sum is σ = 35105616. Its totient is φ = 3021312.

The previous prime is 11451403. The next prime is 11451449. The reversal of 11451420 is 2415411.

It is a super-2 number, since 2×11451420² = 262270040032800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11451393 and 11451402.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 20059 + ... + 20621.

It is an arithmetic number, because the mean of its divisors is an integer number (487578).

Almost surely, 2^11451420 is an apocalyptic number.

11451420 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 11451420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17552808).

11451420 is an abundant number, since it is smaller than the sum of its proper divisors (23654196).

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

11451420 is a wasteful number, since it uses less digits than its factorization.

11451420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 11451420 is about 3383.9946808469. The cubic root of 11451420 is about 225.3995862355.

Adding to 11451420 its reverse (2415411), we get a palindrome (13866831).

The spelling of 11451420 in words is "eleven million, four hundred fifty-one thousand, four hundred twenty".