42021023 has 16 divisors (see below), whose sum is σ = 49012992. Its totient is φ = 35640000.

The previous prime is 42021017. The next prime is 42021037. The reversal of 42021023 is 32012024.

It is not a de Polignac number, because 42021023 - 2⁶ = 42020959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42020989 and 42021007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42021043) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8348 + ... + 12398.

It is an arithmetic number, because the mean of its divisors is an integer number (3063312).

Almost surely, 2^42021023 is an apocalyptic number.

42021023 is a deficient number, since it is larger than the sum of its proper divisors (6991969).

42021023 is a wasteful number, since it uses less digits than its factorization.

42021023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4126.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 42021023 is about 6482.3624551548. The cubic root of 42021023 is about 347.6606520432.

Adding to 42021023 its reverse (32012024), we get a palindrome (74033047).

It can be divided in two parts, 4202 and 1023, that added together give a palindrome (5225).

The spelling of 42021023 in words is "forty-two million, twenty-one thousand, twenty-three".