1423142021 has 16 divisors (see below), whose sum is σ = 1667850240. Its totient is φ = 1188846720.

The previous prime is 1423141981. The next prime is 1423142023. The reversal of 1423142021 is 1202413241.

It is a cyclic number.

It is not a de Polignac number, because 1423142021 - 2²⁶ = 1356033157 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1423141984 and 1423142002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423142023) 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, 365135 + ... + 369011.

It is an arithmetic number, because the mean of its divisors is an integer number (104240640).

Almost surely, 2^1423142021 is an apocalyptic number.

It is an amenable number.

1423142021 is a deficient number, since it is larger than the sum of its proper divisors (244708219).

1423142021 is a wasteful number, since it uses less digits than its factorization.

1423142021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5204.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1423142021 is about 37724.5546163238. The cubic root of 1423142021 is about 1124.8192686790.

Adding to 1423142021 its reverse (1202413241), we get a palindrome (2625555262).

The spelling of 1423142021 in words is "one billion, four hundred twenty-three million, one hundred forty-two thousand, twenty-one".