1544041421 has 16 divisors (see below), whose sum is σ = 1696630320. Its totient is φ = 1396362240.

The previous prime is 1544041417. The next prime is 1544041423. The reversal of 1544041421 is 1241404451.

It can be written as a sum of positive squares in 8 ways, for example, as 12180100 + 1531861321 = 3490^2 + 39139^2 .

It is not a de Polignac number, because 1544041421 - 2² = 1544041417 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 (1544041423) 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, 694091 + ... + 696311.

It is an arithmetic number, because the mean of its divisors is an integer number (106039395).

Almost surely, 2^1544041421 is an apocalyptic number.

It is an amenable number.

1544041421 is a deficient number, since it is larger than the sum of its proper divisors (152588899).

1544041421 is a wasteful number, since it uses less digits than its factorization.

1544041421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3296.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 1544041421 is about 39294.2924735896. The cubic root of 1544041421 is about 1155.8096485087.

Adding to 1544041421 its reverse (1241404451), we get a palindrome (2785445872).

The spelling of 1544041421 in words is "one billion, five hundred forty-four million, forty-one thousand, four hundred twenty-one".