744187421 has 12 divisors (see below), whose sum is σ = 790297632. Its totient is φ = 700638984.

The previous prime is 744187391. The next prime is 744187439. The reversal of 744187421 is 124781447.

It is not a de Polignac number, because 744187421 - 2¹⁴ = 744171037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744187441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52520 + ... + 65166.

It is an arithmetic number, because the mean of its divisors is an integer number (65858136).

Almost surely, 2^744187421 is an apocalyptic number.

It is an amenable number.

744187421 is a deficient number, since it is larger than the sum of its proper divisors (46110211).

744187421 is a wasteful number, since it uses less digits than its factorization.

744187421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12848 (or 12829 counting only the distinct ones).

The product of its digits is 50176, while the sum is 38.

The square root of 744187421 is about 27279.7987712520. The cubic root of 744187421 is about 906.2070606306.

The spelling of 744187421 in words is "seven hundred forty-four million, one hundred eighty-seven thousand, four hundred twenty-one".