1421545 has 8 divisors (see below), whose sum is σ = 1712520. Its totient is φ = 1132800.

The previous prime is 1421543. The next prime is 1421549. The reversal of 1421545 is 5451241.

It can be written as a sum of positive squares in 4 ways, for example, as 278784 + 1142761 = 528^2 + 1069^2 .

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

It is not a de Polignac number, because 1421545 - 2¹ = 1421543 is a prime.

1421545 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1651 + ... + 2359.

It is an arithmetic number, because the mean of its divisors is an integer number (214065).

2^1421545 is an apocalyptic number.

It is an amenable number.

1421545 is a deficient number, since it is larger than the sum of its proper divisors (290975).

1421545 is an equidigital number, since it uses as much as digits as its factorization.

1421545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115.

The product of its digits is 800, while the sum is 22.

The square root of 1421545 is about 1192.2856201431. The cubic root of 1421545 is about 112.4398361435.

Adding to 1421545 its reverse (5451241), we get a palindrome (6872786).

The spelling of 1421545 in words is "one million, four hundred twenty-one thousand, five hundred forty-five".