1744642421 has 4 divisors (see below), whose sum is σ = 1745578752. Its totient is φ = 1743706092.

The previous prime is 1744642381. The next prime is 1744642429. The reversal of 1744642421 is 1242464471.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1744642421 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 (1744642429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465365 + ... + 469098.

It is an arithmetic number, because the mean of its divisors is an integer number (436394688).

Almost surely, 2^1744642421 is an apocalyptic number.

It is an amenable number.

1744642421 is a deficient number, since it is larger than the sum of its proper divisors (936331).

1744642421 is an equidigital number, since it uses as much as digits as its factorization.

1744642421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936330.

The product of its digits is 43008, while the sum is 35.

The square root of 1744642421 is about 41768.9169239520. The cubic root of 1744642421 is about 1203.8401104533.

The spelling of 1744642421 in words is "one billion, seven hundred forty-four million, six hundred forty-two thousand, four hundred twenty-one".