1421520023 has 8 divisors (see below), whose sum is σ = 1772284800. Its totient is φ = 1107677880.

The previous prime is 1421520011. The next prime is 1421520041. The reversal of 1421520023 is 3200251241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1421520023 - 2⁴ = 1421520007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1421519977 and 1421520004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421520073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9230573 + ... + 9230726.

It is an arithmetic number, because the mean of its divisors is an integer number (221535600).

Almost surely, 2^1421520023 is an apocalyptic number.

1421520023 is a deficient number, since it is larger than the sum of its proper divisors (350764777).

1421520023 is a wasteful number, since it uses less digits than its factorization.

1421520023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18461317.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1421520023 is about 37703.0505794956. The cubic root of 1421520023 is about 1124.3917760500.

Adding to 1421520023 its reverse (3200251241), we get a palindrome (4621771264).

The spelling of 1421520023 in words is "one billion, four hundred twenty-one million, five hundred twenty thousand, twenty-three".