1421565 has 8 divisors (see below), whose sum is σ = 2274528. Its totient is φ = 758160.

The previous prime is 1421549. The next prime is 1421569. The reversal of 1421565 is 5651241.

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

It is not a de Polignac number, because 1421565 - 2⁴ = 1421549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421569) 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, 47371 + ... + 47400.

It is an arithmetic number, because the mean of its divisors is an integer number (284316).

2^1421565 is an apocalyptic number.

1421565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1421565 is a deficient number, since it is larger than the sum of its proper divisors (852963).

1421565 is an equidigital number, since it uses as much as digits as its factorization.

1421565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94779.

The product of its digits is 1200, while the sum is 24.

The square root of 1421565 is about 1192.2940073656. The cubic root of 1421565 is about 112.4403634538.

The spelling of 1421565 in words is "one million, four hundred twenty-one thousand, five hundred sixty-five".