43001421 has 8 divisors (see below), whose sum is σ = 59828160. Its totient is φ = 27421152.

The previous prime is 43001417. The next prime is 43001429. The reversal of 43001421 is 12410034.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43001421 - 2² = 43001417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43001421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43001429) 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, 311536 + ... + 311673.

It is an arithmetic number, because the mean of its divisors is an integer number (7478520).

Almost surely, 2^43001421 is an apocalyptic number.

It is an amenable number.

43001421 is a deficient number, since it is larger than the sum of its proper divisors (16826739).

43001421 is a wasteful number, since it uses less digits than its factorization.

43001421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623235.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 43001421 is about 6557.5468736411. The cubic root of 43001421 is about 350.3436651657.

Adding to 43001421 its reverse (12410034), we get a palindrome (55411455).

The spelling of 43001421 in words is "forty-three million, one thousand, four hundred twenty-one".