41421440 has 64 divisors (see below), whose sum is σ = 100741320. Its totient is φ = 16281600.

The previous prime is 41421437. The next prime is 41421451. The reversal of 41421440 is 4412414.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24840256 + 16581184 = 4984^2 + 4072^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38510 + ... + 39570.

Almost surely, 2^41421440 is an apocalyptic number.

41421440 is a gapful number since it is divisible by the number (40) 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 41421440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50370660).

41421440 is an abundant number, since it is smaller than the sum of its proper divisors (59319880).

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

41421440 is a wasteful number, since it uses less digits than its factorization.

41421440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141 (or 1129 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 41421440 is about 6435.9490364670. The cubic root of 41421440 is about 345.9991758253. Note that the first 3 decimals are identical.

Adding to 41421440 its reverse (4412414), we get a palindrome (45833854).

The spelling of 41421440 in words is "forty-one million, four hundred twenty-one thousand, four hundred forty".