4121440 has 24 divisors (see below), whose sum is σ = 9737280. Its totient is φ = 1648512.

The previous prime is 4121431. The next prime is 4121441. The reversal of 4121440 is 441214.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4121441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12720 + ... + 13039.

It is an arithmetic number, because the mean of its divisors is an integer number (405720).

Almost surely, 2^4121440 is an apocalyptic number.

4121440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4121440 is an abundant number, since it is smaller than the sum of its proper divisors (5615840).

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

4121440 is a wasteful number, since it uses less digits than its factorization.

4121440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25774 (or 25766 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 4121440 is about 2030.1330005692. The cubic root of 4121440 is about 160.3305665656.

Adding to 4121440 its reverse (441214), we get a palindrome (4562654).

The spelling of 4121440 in words is "four million, one hundred twenty-one thousand, four hundred forty".