1546421020 has 24 divisors (see below), whose sum is σ = 3418405200. Its totient is φ = 586012032.

The previous prime is 1546421017. The next prime is 1546421021. The reversal of 1546421020 is 201246451.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1546421021) 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 7 ways as a sum of consecutive naturals, for example, 2034385 + ... + 2035144.

It is an arithmetic number, because the mean of its divisors is an integer number (142433550).

Almost surely, 2^1546421020 is an apocalyptic number.

1546421020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1546421020 is an abundant number, since it is smaller than the sum of its proper divisors (1871984180).

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

1546421020 is a wasteful number, since it uses less digits than its factorization.

1546421020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4069557 (or 4069555 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1546421020 is about 39324.5600102531. The cubic root of 1546421020 is about 1156.4031023171.

Adding to 1546421020 its reverse (201246451), we get a palindrome (1747667471).

The spelling of 1546421020 in words is "one billion, five hundred forty-six million, four hundred twenty-one thousand, twenty".