1546421 has 4 divisors (see below), whose sum is σ = 1553292. Its totient is φ = 1539552.

The previous prime is 1546403. The next prime is 1546423. The reversal of 1546421 is 1246451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130321 + 1416100 = 361^2 + 1190^2 .

It is a cyclic number.

It is not a de Polignac number, because 1546421 - 2⁶ = 1546357 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 (1546423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3086 + ... + 3551.

It is an arithmetic number, because the mean of its divisors is an integer number (388323).

2^1546421 is an apocalyptic number.

It is an amenable number.

1546421 is a deficient number, since it is larger than the sum of its proper divisors (6871).

1546421 is an equidigital number, since it uses as much as digits as its factorization.

1546421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6870.

The product of its digits is 960, while the sum is 23.

The square root of 1546421 is about 1243.5517681223. The cubic root of 1546421 is about 115.6403097332.

The spelling of 1546421 in words is "one million, five hundred forty-six thousand, four hundred twenty-one".