1420023 has 16 divisors (see below), whose sum is σ = 2123136. Its totient is φ = 836640.

The previous prime is 1420009. The next prime is 1420031. The reversal of 1420023 is 3200241.

It is not a de Polignac number, because 1420023 - 2⁹ = 1419511 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1419990 and 1420008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420063) 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, 640 + ... + 1802.

It is an arithmetic number, because the mean of its divisors is an integer number (132696).

2^1420023 is an apocalyptic number.

1420023 is a deficient number, since it is larger than the sum of its proper divisors (703113).

1420023 is a wasteful number, since it uses less digits than its factorization.

1420023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 1420023 is about 1191.6471793278. The cubic root of 1420023 is about 112.3996933077.

Adding to 1420023 its reverse (3200241), we get a palindrome (4620264).

It can be divided in two parts, 1 and 420023, that added together give a palindrome (420024).

The spelling of 1420023 in words is "one million, four hundred twenty thousand, twenty-three".