1431023421 has 8 divisors (see below), whose sum is σ = 1912838944. Its totient is φ = 951611760.

The previous prime is 1431023417. The next prime is 1431023423. The reversal of 1431023421 is 1243201341.

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

It is not a de Polignac number, because 1431023421 - 2² = 1431023417 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 (1431023423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 599575 + ... + 601956.

It is an arithmetic number, because the mean of its divisors is an integer number (239104868).

Almost surely, 2^1431023421 is an apocalyptic number.

It is an amenable number.

1431023421 is a deficient number, since it is larger than the sum of its proper divisors (481815523).

1431023421 is a wasteful number, since it uses less digits than its factorization.

1431023421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201931.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1431023421 is about 37828.8702051753. The cubic root of 1431023421 is about 1126.8918740992.

Adding to 1431023421 its reverse (1243201341), we get a palindrome (2674224762).

The spelling of 1431023421 in words is "one billion, four hundred thirty-one million, twenty-three thousand, four hundred twenty-one".