1420723345 has 8 divisors (see below), whose sum is σ = 1708220520. Its totient is φ = 1134343680.

The previous prime is 1420723321. The next prime is 1420723391. The reversal of 1420723345 is 5433270241.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 56972304 + 1363751041 = 7548^2 + 36929^2 .

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

It is not a de Polignac number, because 1420723345 - 2⁵ = 1420723313 is a prime.

It is an unprimeable number.

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, 276576 + ... + 281665.

It is an arithmetic number, because the mean of its divisors is an integer number (213527565).

Almost surely, 2^1420723345 is an apocalyptic number.

It is an amenable number.

1420723345 is a deficient number, since it is larger than the sum of its proper divisors (287497175).

1420723345 is an equidigital number, since it uses as much as digits as its factorization.

1420723345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558755.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 1420723345 is about 37692.4839324765. The cubic root of 1420723345 is about 1124.1816850740.

Adding to 1420723345 its reverse (5433270241), we get a palindrome (6853993586).

The spelling of 1420723345 in words is "one billion, four hundred twenty million, seven hundred twenty-three thousand, three hundred forty-five".