1421445 has 16 divisors (see below), whose sum is σ = 2290752. Its totient is φ = 752640.

The previous prime is 1421437. The next prime is 1421449. The reversal of 1421445 is 5441241.

It is a happy number.

It is not a de Polignac number, because 1421445 - 2³ = 1421437 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2650 + ... + 3140.

It is an arithmetic number, because the mean of its divisors is an integer number (143172).

2^1421445 is an apocalyptic number.

1421445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1421445 is a deficient number, since it is larger than the sum of its proper divisors (869307).

1421445 is a wasteful number, since it uses less digits than its factorization.

1421445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692.

The product of its digits is 640, while the sum is 21.

The square root of 1421445 is about 1192.2436831454. The cubic root of 1421445 is about 112.4371995175.

Adding to 1421445 its reverse (5441241), we get a palindrome (6862686).

The spelling of 1421445 in words is "one million, four hundred twenty-one thousand, four hundred forty-five".