7544061421 has 8 divisors (see below), whose sum is σ = 8404525080. Its totient is φ = 6723619392.

The previous prime is 7544061419. The next prime is 7544061431. The reversal of 7544061421 is 1241604457.

It can be written as a sum of positive squares in 4 ways, for example, as 1841697225 + 5702364196 = 42915^2 + 75514^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7544061421 - 2¹ = 7544061419 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 (7544061431) 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 7 ways as a sum of consecutive naturals, for example, 10005010 + ... + 10005763.

It is an arithmetic number, because the mean of its divisors is an integer number (1050565635).

Almost surely, 2^7544061421 is an apocalyptic number.

It is an amenable number.

7544061421 is a deficient number, since it is larger than the sum of its proper divisors (860463659).

7544061421 is a wasteful number, since it uses less digits than its factorization.

7544061421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20010815.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 7544061421 is about 86856.5565803757. The cubic root of 7544061421 is about 1961.2595524906.

Adding to 7544061421 its reverse (1241604457), we get a palindrome (8785665878).

The spelling of 7544061421 in words is "seven billion, five hundred forty-four million, sixty-one thousand, four hundred twenty-one".