1423242021 has 16 divisors (see below), whose sum is σ = 1906813440. Its totient is φ = 944262000.

The previous prime is 1423242011. The next prime is 1423242031. The reversal of 1423242021 is 1202423241.

It is an interprime number because it is at equal distance from previous prime (1423242011) and next prime (1423242031).

It is not a de Polignac number, because 1423242021 - 2⁶ = 1423241957 is a prime.

It is a super-3 number, since 3×1423242021³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423242011) 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, 631146 + ... + 633396.

It is an arithmetic number, because the mean of its divisors is an integer number (119175840).

Almost surely, 2^1423242021 is an apocalyptic number.

It is an amenable number.

1423242021 is a deficient number, since it is larger than the sum of its proper divisors (483571419).

1423242021 is a wasteful number, since it uses less digits than its factorization.

1423242021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3176.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1423242021 is about 37725.8799897365. The cubic root of 1423242021 is about 1124.8456139748.

Adding to 1423242021 its reverse (1202423241), we get a palindrome (2625665262).

The spelling of 1423242021 in words is "one billion, four hundred twenty-three million, two hundred forty-two thousand, twenty-one".