1548421540 has 36 divisors (see below), whose sum is σ = 3454225236. Its totient is φ = 582932992.

The previous prime is 1548421531. The next prime is 1548421543. The reversal of 1548421540 is 451248451.

It can be written as a sum of positive squares in 6 ways, for example, as 212226624 + 1336194916 = 14568^2 + 36554^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 1548421496 and 1548421505.

It is not an unprimeable number, because it can be changed into a prime (1548421543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128167 + ... + 139726.

It is an arithmetic number, because the mean of its divisors is an integer number (95950701).

Almost surely, 2^1548421540 is an apocalyptic number.

1548421540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1548421540 is an abundant number, since it is smaller than the sum of its proper divisors (1905803696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1548421540 is a wasteful number, since it uses less digits than its factorization.

1548421540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267936 (or 267917 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 1548421540 is about 39349.9878017770. The cubic root of 1548421540 is about 1156.9015458510.

Adding to 1548421540 its reverse (451248451), we get a palindrome (1999669991).

The spelling of 1548421540 in words is "one billion, five hundred forty-eight million, four hundred twenty-one thousand, five hundred forty".