1423720 has 16 divisors (see below), whose sum is σ = 3203460. Its totient is φ = 569472.

The previous prime is 1423717. The next prime is 1423753. The reversal of 1423720 is 273241.

It can be written as a sum of positive squares in 2 ways, for example, as 1258884 + 164836 = 1122^2 + 406^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17757 + ... + 17836.

2^1423720 is an apocalyptic number.

1423720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1423720 is an abundant number, since it is smaller than the sum of its proper divisors (1779740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1423720 is a wasteful number, since it uses less digits than its factorization.

1423720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35604 (or 35600 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 1423720 is about 1193.1973851798. The cubic root of 1423720 is about 112.4971521913.

Adding to 1423720 its reverse (273241), we get a palindrome (1696961).

The spelling of 1423720 in words is "one million, four hundred twenty-three thousand, seven hundred twenty".