1744457421 has 16 divisors (see below), whose sum is σ = 2694637184. Its totient is φ = 983176704.

The previous prime is 1744457419. The next prime is 1744457479. The reversal of 1744457421 is 1247544471.

It is a happy number.

It is not a de Polignac number, because 1744457421 - 2¹ = 1744457419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1744457421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1744457401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 567436 + ... + 570501.

It is an arithmetic number, because the mean of its divisors is an integer number (168414824).

Almost surely, 2^1744457421 is an apocalyptic number.

It is an amenable number.

1744457421 is a deficient number, since it is larger than the sum of its proper divisors (950179763).

1744457421 is a wasteful number, since it uses less digits than its factorization.

1744457421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138020.

The product of its digits is 125440, while the sum is 39.

The square root of 1744457421 is about 41766.7022997986. The cubic root of 1744457421 is about 1203.7975576470.

The spelling of 1744457421 in words is "one billion, seven hundred forty-four million, four hundred fifty-seven thousand, four hundred twenty-one".