1420445 has 18 divisors (see below), whose sum is σ = 1891854. Its totient is φ = 1023360.

The previous prime is 1420429. The next prime is 1420483. The reversal of 1420445 is 5440241.

1420445 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in 9 ways, for example, as 1387684 + 32761 = 1178^2 + 181^2 .

It is not a de Polignac number, because 1420445 - 2⁴ = 1420429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 34625 + ... + 34665.

It is an arithmetic number, because the mean of its divisors is an integer number (105103).

2^1420445 is an apocalyptic number.

It is an amenable number.

1420445 is a deficient number, since it is larger than the sum of its proper divisors (471409).

1420445 is an equidigital number, since it uses as much as digits as its factorization.

1420445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1420445 is about 1191.8242320074. The cubic root of 1420445 is about 112.4108264543.

Multiplying 1420445 by its sum of digits (20), we get a square (28408900 = 5330²).

Adding to 1420445 its reverse (5440241), we get a palindrome (6860686).

The spelling of 1420445 in words is "one million, four hundred twenty thousand, four hundred forty-five".