744001421 has 4 divisors (see below), whose sum is σ = 744072000. Its totient is φ = 743930844.

The previous prime is 744001417. The next prime is 744001441. The reversal of 744001421 is 124100447.

It is a happy number.

744001421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 124100447 = 827 ⋅150061.

It is a cyclic number.

It is not a de Polignac number, because 744001421 - 2² = 744001417 is a prime.

It is a super-2 number, since 2×744001421² = 1107076228900038482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744001441) 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, 15941 + ... + 41738.

It is an arithmetic number, because the mean of its divisors is an integer number (186018000).

Almost surely, 2^744001421 is an apocalyptic number.

It is an amenable number.

744001421 is a deficient number, since it is larger than the sum of its proper divisors (70579).

744001421 is a wasteful number, since it uses less digits than its factorization.

744001421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70578.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 744001421 is about 27276.3894421531. The cubic root of 744001421 is about 906.1315561035.

Adding to 744001421 its reverse (124100447), we get a palindrome (868101868).

The spelling of 744001421 in words is "seven hundred forty-four million, one thousand, four hundred twenty-one".