1421642023 has 4 divisors (see below), whose sum is σ = 1423077568. Its totient is φ = 1420206480.

The previous prime is 1421641987. The next prime is 1421642069. The reversal of 1421642023 is 3202461241.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1421642023 - 2¹³ = 1421633831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421642623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 716286 + ... + 718267.

It is an arithmetic number, because the mean of its divisors is an integer number (355769392).

Almost surely, 2^1421642023 is an apocalyptic number.

1421642023 is a deficient number, since it is larger than the sum of its proper divisors (1435545).

1421642023 is an equidigital number, since it uses as much as digits as its factorization.

1421642023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435544.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1421642023 is about 37704.6684510022. The cubic root of 1421642023 is about 1124.4239415888.

The spelling of 1421642023 in words is "one billion, four hundred twenty-one million, six hundred forty-two thousand, twenty-three".