1002031421 has 4 divisors (see below), whose sum is σ = 1004040000. Its totient is φ = 1000022844.

The previous prime is 1002031417. The next prime is 1002031427. The reversal of 1002031421 is 1241302001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1241302001 = 73 ⋅17004137.

It is a cyclic number.

It is not a de Polignac number, because 1002031421 - 2² = 1002031417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1002031396 and 1002031405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002031427) 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 3 ways as a sum of consecutive naturals, for example, 1003541 + ... + 1004538.

It is an arithmetic number, because the mean of its divisors is an integer number (251010000).

Almost surely, 2^1002031421 is an apocalyptic number.

It is an amenable number.

1002031421 is a deficient number, since it is larger than the sum of its proper divisors (2008579).

1002031421 is an equidigital number, since it uses as much as digits as its factorization.

1002031421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008578.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1002031421 is about 31654.8798923641. The cubic root of 1002031421 is about 1000.6766823311.

Adding to 1002031421 its reverse (1241302001), we get a palindrome (2243333422).

The spelling of 1002031421 in words is "one billion, two million, thirty-one thousand, four hundred twenty-one".