1421355 has 32 divisors (see below), whose sum is σ = 2528064. Its totient is φ = 677376.

The previous prime is 1421351. The next prime is 1421389. The reversal of 1421355 is 5531241.

It is not a de Polignac number, because 1421355 - 2² = 1421351 is a prime.

1421355 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1421351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7117 + ... + 7313.

It is an arithmetic number, because the mean of its divisors is an integer number (79002).

2^1421355 is an apocalyptic number.

1421355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1421355 is a deficient number, since it is larger than the sum of its proper divisors (1106709).

1421355 is a wasteful number, since it uses less digits than its factorization.

1421355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255.

The product of its digits is 600, while the sum is 21.

The square root of 1421355 is about 1192.2059385861. The cubic root of 1421355 is about 112.4348264485.

Adding to 1421355 its reverse (5531241), we get a palindrome (6952596).

The spelling of 1421355 in words is "one million, four hundred twenty-one thousand, three hundred fifty-five".