43400621 has 8 divisors (see below), whose sum is σ = 47439264. Its totient is φ = 39377520.

The previous prime is 43400603. The next prime is 43400627. The reversal of 43400621 is 12600434.

It is a happy number.

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 43400621 - 2⁶ = 43400557 is a prime.

It is a super-2 number, since 2×43400621² = 3767227806371282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43400593 and 43400602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43400627) 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, 2411 + ... + 9623.

It is an arithmetic number, because the mean of its divisors is an integer number (5929908).

Almost surely, 2^43400621 is an apocalyptic number.

It is an amenable number.

43400621 is a deficient number, since it is larger than the sum of its proper divisors (4038643).

43400621 is a wasteful number, since it uses less digits than its factorization.

43400621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7771.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 43400621 is about 6587.9147687261. The cubic root of 43400621 is about 351.4244560028.

The spelling of 43400621 in words is "forty-three million, four hundred thousand, six hundred twenty-one".